| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer 3 // * License and Disclaimer *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. 9 // * include a list of copyright holders. *
10 // * 10 // * *
11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. *
17 // * 17 // * *
18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. *
24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 // G4PhaseSpaceDecayChannel class implementati <<
27 // 26 //
28 // Author: H.Kurashige, 27 July 1996 << 27 // $Id: G4PhaseSpaceDecayChannel.cc 95335 2016-02-05 07:47:45Z gcosmo $
29 // ------------------------------------------- << 28 //
30 << 29 //
31 #include "G4PhaseSpaceDecayChannel.hh" << 30 // ------------------------------------------------------------
>> 31 // GEANT 4 class header file
>> 32 //
>> 33 // History: first implementation, based on object model of
>> 34 // 27 July 1996 H.Kurashige
>> 35 // 20 Oct 1996 H.Kurashige
>> 36 // 30 May 1997 H.Kurashige
>> 37 // ------------------------------------------------------------
32 38
33 #include "G4DecayProducts.hh" <<
34 #include "G4LorentzRotation.hh" <<
35 #include "G4LorentzVector.hh" <<
36 #include "G4ParticleDefinition.hh" 39 #include "G4ParticleDefinition.hh"
37 #include "G4PhysicalConstants.hh" 40 #include "G4PhysicalConstants.hh"
38 #include "G4SystemOfUnits.hh" 41 #include "G4SystemOfUnits.hh"
>> 42 #include "G4DecayProducts.hh"
39 #include "G4VDecayChannel.hh" 43 #include "G4VDecayChannel.hh"
>> 44 #include "G4PhaseSpaceDecayChannel.hh"
40 #include "Randomize.hh" 45 #include "Randomize.hh"
>> 46 #include "G4LorentzVector.hh"
>> 47 #include "G4LorentzRotation.hh"
>> 48
>> 49 G4ThreadLocal G4double G4PhaseSpaceDecayChannel::current_parent_mass = 0.0;
41 50
42 G4PhaseSpaceDecayChannel::G4PhaseSpaceDecayCha 51 G4PhaseSpaceDecayChannel::G4PhaseSpaceDecayChannel(G4int Verbose)
43 : G4VDecayChannel("Phase Space", Verbose) << 52 :G4VDecayChannel("Phase Space", Verbose)
44 {} << 53 {
45 54
46 G4PhaseSpaceDecayChannel::G4PhaseSpaceDecayCha << 55 }
47 <<
48 <<
49 <<
50 <<
51 <<
52 <<
53 : G4VDecayChannel("Phase Space", theParentNa <<
54 theDaughterName2, theDaugh <<
55 {} <<
56 56
57 G4DecayProducts* G4PhaseSpaceDecayChannel::Dec << 57 G4PhaseSpaceDecayChannel::G4PhaseSpaceDecayChannel(
>> 58 const G4String& theParentName,
>> 59 G4double theBR,
>> 60 G4int theNumberOfDaughters,
>> 61 const G4String& theDaughterName1,
>> 62 const G4String& theDaughterName2,
>> 63 const G4String& theDaughterName3,
>> 64 const G4String& theDaughterName4 )
>> 65 :G4VDecayChannel("Phase Space",
>> 66 theParentName,theBR,
>> 67 theNumberOfDaughters,
>> 68 theDaughterName1,
>> 69 theDaughterName2,
>> 70 theDaughterName3,
>> 71 theDaughterName4)
58 { 72 {
59 #ifdef G4VERBOSE <<
60 if (GetVerboseLevel() > 1) G4cout << "G4Phas <<
61 #endif <<
62 73
63 G4DecayProducts* products = nullptr; << 74 }
64 <<
65 CheckAndFillParent(); <<
66 CheckAndFillDaughters(); <<
67 75
68 if (parentMass > 0.0) << 76 G4PhaseSpaceDecayChannel::~G4PhaseSpaceDecayChannel()
69 current_parent_mass.Put(parentMass); << 77 {
70 else << 78 }
71 current_parent_mass.Put(G4MT_parent_mass); <<
72 79
73 switch (numberOfDaughters) { << 80 G4DecayProducts *G4PhaseSpaceDecayChannel::DecayIt(G4double parentMass)
74 case 0: << 81 {
75 #ifdef G4VERBOSE 82 #ifdef G4VERBOSE
76 if (GetVerboseLevel() > 0) { << 83 if (GetVerboseLevel()>1) G4cout << "G4PhaseSpaceDecayChannel::DecayIt ";
77 G4cout << "G4PhaseSpaceDecayChannel::D <<
78 G4cout << " daughters not defined " << <<
79 } <<
80 #endif 84 #endif
81 break; << 85
82 case 1: << 86 G4DecayProducts * products = 0;
83 products = OneBodyDecayIt(); << 87
84 break; << 88 if (G4MT_parent == 0) FillParent();
85 case 2: << 89 if (G4MT_daughters == 0) FillDaughters();
86 products = TwoBodyDecayIt(); << 90
87 break; << 91 if (parentMass >0.0) current_parent_mass = parentMass;
88 case 3: << 92 else current_parent_mass = G4MT_parent_mass;
89 products = ThreeBodyDecayIt(); << 93
90 break; << 94 switch (numberOfDaughters){
91 default: << 95 case 0:
92 products = ManyBodyDecayIt(); << 96 #ifdef G4VERBOSE
93 break; << 97 if (GetVerboseLevel()>0) {
94 } << 98 G4cout << "G4PhaseSpaceDecayChannel::DecayIt ";
95 #ifdef G4VERBOSE << 99 G4cout << " daughters not defined " <<G4endl;
96 if ((products == nullptr) && (GetVerboseLeve << 100 }
97 G4cout << "G4PhaseSpaceDecayChannel::Decay << 101 #endif
98 G4cout << *parent_name << " cannot decay " << 102 break;
>> 103 case 1:
>> 104 products = OneBodyDecayIt();
>> 105 break;
>> 106 case 2:
>> 107 products = TwoBodyDecayIt();
>> 108 break;
>> 109 case 3:
>> 110 products = ThreeBodyDecayIt();
>> 111 break;
>> 112 default:
>> 113 products = ManyBodyDecayIt();
>> 114 break;
>> 115 }
>> 116 #ifdef G4VERBOSE
>> 117 if ((products == 0) && (GetVerboseLevel()>0)) {
>> 118 G4cout << "G4PhaseSpaceDecayChannel::DecayIt ";
>> 119 G4cout << *parent_name << " can not decay " << G4endl;
99 DumpInfo(); 120 DumpInfo();
100 } 121 }
101 #endif 122 #endif
102 return products; 123 return products;
103 } 124 }
104 125
105 G4DecayProducts* G4PhaseSpaceDecayChannel::One << 126 G4DecayProducts *G4PhaseSpaceDecayChannel::OneBodyDecayIt()
106 { 127 {
107 #ifdef G4VERBOSE 128 #ifdef G4VERBOSE
108 if (GetVerboseLevel() > 1) G4cout << "G4Phas << 129 if (GetVerboseLevel()>1) G4cout << "G4PhaseSpaceDecayChannel::OneBodyDecayIt()"<<G4endl;
109 #endif 130 #endif
110 // parent mass <<
111 G4double parentmass = current_parent_mass.Ge <<
112 131
113 // create parent G4DynamicParticle at rest << 132 //create parent G4DynamicParticle at rest
114 G4ThreeVector dummy; 133 G4ThreeVector dummy;
115 auto parentparticle = new G4DynamicParticle( << 134 G4DynamicParticle * parentparticle = new G4DynamicParticle( G4MT_parent, dummy, 0.0);
116 // create G4Decayproducts << 135 //create G4Decayproducts
117 auto products = new G4DecayProducts(*parentp << 136 G4DecayProducts *products = new G4DecayProducts(*parentparticle);
118 delete parentparticle; 137 delete parentparticle;
119 138
120 // create daughter G4DynamicParticle at rest << 139 //create daughter G4DynamicParticle at rest
121 auto daughterparticle = new G4DynamicParticl << 140 G4DynamicParticle * daughterparticle = new G4DynamicParticle( G4MT_daughters[0], dummy, 0.0);
122 if (useGivenDaughterMass) daughterparticle-> <<
123 products->PushProducts(daughterparticle); 141 products->PushProducts(daughterparticle);
124 142
125 #ifdef G4VERBOSE 143 #ifdef G4VERBOSE
126 if (GetVerboseLevel() > 1) { << 144 if (GetVerboseLevel()>1) {
127 G4cout << "G4PhaseSpaceDecayChannel::OneBo << 145 G4cout << "G4PhaseSpaceDecayChannel::OneBodyDecayIt ";
128 G4cout << " create decay products in rest << 146 G4cout << " create decay products in rest frame " <<G4endl;
129 products->DumpInfo(); << 147 products->DumpInfo();
130 } 148 }
131 #endif 149 #endif
132 return products; 150 return products;
133 } 151 }
134 152
135 G4DecayProducts* G4PhaseSpaceDecayChannel::Two << 153 G4DecayProducts *G4PhaseSpaceDecayChannel::TwoBodyDecayIt()
136 { 154 {
137 #ifdef G4VERBOSE 155 #ifdef G4VERBOSE
138 if (GetVerboseLevel() > 1) G4cout << "G4Phas << 156 if (GetVerboseLevel()>1) G4cout << "G4PhaseSpaceDecayChannel::TwoBodyDecayIt()"<<G4endl;
139 #endif 157 #endif
140 // parent mass 158 // parent mass
141 G4double parentmass = current_parent_mass.Ge << 159 G4double parentmass = current_parent_mass;
142 << 160
143 // daughters'mass, width << 161 //daughters'mass, width
144 G4double daughtermass[2], daughterwidth[2]; << 162 G4double daughtermass[2], daughterwidth[2];
>> 163 G4double daughtermomentum;
145 daughtermass[0] = G4MT_daughters_mass[0]; 164 daughtermass[0] = G4MT_daughters_mass[0];
146 daughtermass[1] = G4MT_daughters_mass[1]; 165 daughtermass[1] = G4MT_daughters_mass[1];
147 daughterwidth[0] = G4MT_daughters_width[0]; 166 daughterwidth[0] = G4MT_daughters_width[0];
148 daughterwidth[1] = G4MT_daughters_width[1]; 167 daughterwidth[1] = G4MT_daughters_width[1];
149 168
150 // create parent G4DynamicParticle at rest << 169 //create parent G4DynamicParticle at rest
151 G4ThreeVector dummy; 170 G4ThreeVector dummy;
152 auto parentparticle = new G4DynamicParticle( << 171 G4DynamicParticle * parentparticle = new G4DynamicParticle( G4MT_parent, dummy, 0.0, parentmass);
153 // create G4Decayproducts << 172 //create G4Decayproducts
154 auto products = new G4DecayProducts(*parentp << 173 G4DecayProducts *products = new G4DecayProducts(*parentparticle);
155 delete parentparticle; 174 delete parentparticle;
156 175
157 if (!useGivenDaughterMass) { << 176 G4bool withWidth = (daughterwidth[0]>1.0e-3*daughtermass[0]) || (daughterwidth[1]>1.0e-3*daughtermass[1]);
158 G4bool withWidth = (daughterwidth[0] > 1.0 << 177 if (withWidth) {
159 || (daughterwidth[1] > << 178 G4double sumofdaughterwidthsq = daughterwidth[0]*daughterwidth[0]+daughterwidth[1]*daughterwidth[1];
160 if (withWidth) { << 179 // check parent mass and daughter mass
161 G4double sumofdaughterwidthsq = << 180 G4double maxDev = (parentmass - daughtermass[0] - daughtermass[1] )/std::sqrt(sumofdaughterwidthsq);
162 daughterwidth[0] * daughterwidth[0] + << 181 if (maxDev < -0.9*rangeMass ){
163 // check parent mass and daughter mass << 182 #ifdef G4VERBOSE
164 G4double maxDev = << 183 if (GetVerboseLevel()>0) {
165 (parentmass - daughtermass[0] - daught << 184 G4cout << "G4PhaseSpaceDecayChannel::TwoBodyDecayIt "
166 if (maxDev <= -1.0 * rangeMass) { << 185 << "sum of daughter mass is larger than parent mass" << G4endl;
167 #ifdef G4VERBOSE << 186 G4cout << "parent :" << G4MT_parent->GetParticleName() << " " << current_parent_mass/GeV << G4endl;
168 if (GetVerboseLevel() > 0) { << 187 G4cout << "daughter 1 :" << G4MT_daughters[0]->GetParticleName() << " " << daughtermass[0]/GeV << G4endl;
169 G4cout << "G4PhaseSpaceDecayChannel: << 188 G4cout << "daughter 2:" << G4MT_daughters[1]->GetParticleName() << " " << daughtermass[1]/GeV << G4endl;
170 << "Sum of daughter mass is l << 189 }
171 G4cout << "Parent :" << G4MT_parent- << 190 #endif
172 << current_parent_mass.Get() << 191 G4Exception("G4PhaseSpaceDecayChannel::TwoBodyDecayIt",
173 G4cout << "Daughter 1 :" << G4MT_dau << 192 "PART112", JustWarning,
174 << daughtermass[0] / GeV << G << 193 "Can not create decay products: sum of daughter mass is larger than parent mass");
175 G4cout << "Daughter 2:" << G4MT_daug << 194 return products;
176 << daughtermass[1] / GeV << G << 195 }
177 } << 196 G4double dm1= DynamicalMass(daughtermass[0],daughterwidth[0], maxDev);
178 #endif << 197 G4double dm2= DynamicalMass(daughtermass[1],daughterwidth[1], maxDev);
179 G4Exception("G4PhaseSpaceDecayChannel: << 198 while (dm1+dm2>parentmass){
180 "Cannot create decay produ << 199 dm1= DynamicalMass(daughtermass[0],daughterwidth[0], maxDev);
181 larger than parent mass!" << 200 dm2= DynamicalMass(daughtermass[1],daughterwidth[1], maxDev);
182 return products; << 201 }
183 } << 202 daughtermass[0] = dm1;
184 G4double dm1 = daughtermass[0]; << 203 daughtermass[1] = dm2;
185 if (daughterwidth[0] > 0.) dm1 = Dynamic << 204 } else {
186 G4double dm2 = daughtermass[1]; << 205 if (parentmass < daughtermass[0] + daughtermass[1] ){
187 if (daughterwidth[1] > 0.) dm2 = Dynamic << 206 #ifdef G4VERBOSE
188 while (dm1 + dm2 > parentmass) // Loop << 207 if (GetVerboseLevel()>0) {
189 { << 208 G4cout << "G4PhaseSpaceDecayChannel::TwoBodyDecayIt "
190 dm1 = DynamicalMass(daughtermass[0], d << 209 << "sum of daughter mass is larger than parent mass" << G4endl;
191 dm2 = DynamicalMass(daughtermass[1], d << 210 G4cout << "parent :" << G4MT_parent->GetParticleName() << " " << current_parent_mass/GeV << G4endl;
192 } << 211 G4cout << "daughter 1 :" << G4MT_daughters[0]->GetParticleName() << " " << daughtermass[0]/GeV << G4endl;
193 daughtermass[0] = dm1; << 212 G4cout << "daughter 2:" << G4MT_daughters[1]->GetParticleName() << " " << daughtermass[1]/GeV << G4endl;
194 daughtermass[1] = dm2; << 213 }
195 } << 214 #endif
196 } << 215 G4Exception("G4PhaseSpaceDecayChannel::TwoBodyDecayIt",
197 else { << 216 "PART112", JustWarning,
198 // use given daughter mass; << 217 "Can not create decay products: sum of daughter mass is larger than parent mass");
199 daughtermass[0] = givenDaughterMasses[0]; << 218 return products;
200 daughtermass[1] = givenDaughterMasses[1]; << 219 }
201 } << 220 }
202 if (parentmass < daughtermass[0] + daughterm << 221
203 #ifdef G4VERBOSE << 222 //calculate daughter momentum
204 if (GetVerboseLevel() > 0) { << 223 daughtermomentum = Pmx(parentmass,daughtermass[0],daughtermass[1]);
205 G4cout << "G4PhaseSpaceDecayChannel::Two << 224
206 << "Sum of daughter mass is large << 225 G4double costheta = 2.*G4UniformRand()-1.0;
207 G4cout << "Parent :" << G4MT_parent->Get << 226 G4double sintheta = std::sqrt((1.0 - costheta)*(1.0 + costheta));
208 << current_parent_mass.Get() / Ge << 227 G4double phi = twopi*G4UniformRand()*rad;
209 G4cout << "Daughter 1 :" << G4MT_daughte << 228 G4ThreeVector direction(sintheta*std::cos(phi),sintheta*std::sin(phi),costheta);
210 << daughtermass[0] / GeV << G4end << 229
211 G4cout << "Daughter 2:" << G4MT_daughter << 230 //create daughter G4DynamicParticle
212 << daughtermass[1] / GeV << G4end << 231 G4double Ekin = std::sqrt(daughtermomentum*daughtermomentum + daughtermass[0]*daughtermass[0]) - daughtermass[0];
213 if (useGivenDaughterMass) { << 232 G4DynamicParticle * daughterparticle = new G4DynamicParticle( G4MT_daughters[0], direction, Ekin, daughtermass[0]);
214 G4cout << "Daughter Mass is given." << <<
215 } <<
216 } <<
217 #endif <<
218 G4Exception("G4PhaseSpaceDecayChannel::Two <<
219 "Cannot create decay products: <<
220 larger than parent mass!"); <<
221 return products; <<
222 } <<
223 <<
224 // calculate daughter momentum <<
225 G4double daughtermomentum = Pmx(parentmass, <<
226 <<
227 G4double costheta = 2. * G4UniformRand() - 1 <<
228 G4double sintheta = std::sqrt((1.0 - costhet <<
229 G4double phi = twopi * G4UniformRand() * rad <<
230 G4ThreeVector direction(sintheta * std::cos( <<
231 <<
232 // create daughter G4DynamicParticle <<
233 G4double Ekin = std::sqrt(daughtermomentum * <<
234 - daughtermass[0]; <<
235 auto daughterparticle = <<
236 new G4DynamicParticle(G4MT_daughters[0], d <<
237 products->PushProducts(daughterparticle); 233 products->PushProducts(daughterparticle);
238 Ekin = std::sqrt(daughtermomentum * daughter << 234 Ekin = std::sqrt(daughtermomentum*daughtermomentum + daughtermass[1]*daughtermass[1]) - daughtermass[1];
239 - daughtermass[1]; << 235 daughterparticle = new G4DynamicParticle( G4MT_daughters[1], -1.0*direction, Ekin, daughtermass[1]);
240 daughterparticle = <<
241 new G4DynamicParticle(G4MT_daughters[1], - <<
242 products->PushProducts(daughterparticle); 236 products->PushProducts(daughterparticle);
243 237
244 #ifdef G4VERBOSE 238 #ifdef G4VERBOSE
245 if (GetVerboseLevel() > 1) { << 239 if (GetVerboseLevel()>1) {
246 G4cout << "G4PhaseSpaceDecayChannel::TwoBo << 240 G4cout << "G4PhaseSpaceDecayChannel::TwoBodyDecayIt ";
247 G4cout << " Create decay products in rest << 241 G4cout << " create decay products in rest frame " <<G4endl;
248 products->DumpInfo(); << 242 products->DumpInfo();
249 } 243 }
250 #endif 244 #endif
251 return products; 245 return products;
252 } 246 }
253 247
254 G4DecayProducts* G4PhaseSpaceDecayChannel::Thr << 248 G4DecayProducts *G4PhaseSpaceDecayChannel::ThreeBodyDecayIt()
>> 249 // algorism of this code is originally written in GDECA3 of GEANT3
255 { 250 {
256 // Algorithm of this code originally written <<
257 <<
258 #ifdef G4VERBOSE 251 #ifdef G4VERBOSE
259 if (GetVerboseLevel() > 1) G4cout << "G4Phas << 252 if (GetVerboseLevel()>1) G4cout << "G4PhaseSpaceDecayChannel::ThreeBodyDecayIt()"<<G4endl;
260 #endif 253 #endif
261 // parent mass 254 // parent mass
262 G4double parentmass = current_parent_mass.Ge << 255 G4double parentmass = current_parent_mass;
263 // daughters'mass << 256 //daughters'mass
264 G4double daughtermass[3], daughterwidth[3]; << 257 G4double daughtermass[3], daughterwidth[3];
265 G4double sumofdaughtermass = 0.0; 258 G4double sumofdaughtermass = 0.0;
266 G4double sumofdaughterwidthsq = 0.0; 259 G4double sumofdaughterwidthsq = 0.0;
267 G4bool withWidth = false; << 260 G4bool withWidth = false;
268 for (G4int index = 0; index < 3; ++index) { << 261 for (G4int index=0; index<3; index++){
269 daughtermass[index] = G4MT_daughters_mass[ 262 daughtermass[index] = G4MT_daughters_mass[index];
270 sumofdaughtermass += daughtermass[index]; 263 sumofdaughtermass += daughtermass[index];
271 daughterwidth[index] = G4MT_daughters_widt 264 daughterwidth[index] = G4MT_daughters_width[index];
272 sumofdaughterwidthsq += daughterwidth[inde << 265 sumofdaughterwidthsq += daughterwidth[index]*daughterwidth[index];
273 withWidth = withWidth || (daughterwidth[in << 266 withWidth = withWidth ||(daughterwidth[index]>1.0e-3*daughtermass[index]);
274 } 267 }
275 << 268
276 // create parent G4DynamicParticle at rest << 269 //create parent G4DynamicParticle at rest
277 G4ThreeVector dummy; 270 G4ThreeVector dummy;
278 auto parentparticle = new G4DynamicParticle( << 271 G4DynamicParticle * parentparticle = new G4DynamicParticle( G4MT_parent, dummy, 0.0, parentmass);
279 272
280 // create G4Decayproducts << 273
281 auto products = new G4DecayProducts(*parentp << 274 //create G4Decayproducts
>> 275 G4DecayProducts *products = new G4DecayProducts(*parentparticle);
282 delete parentparticle; 276 delete parentparticle;
283 277
284 if (!useGivenDaughterMass) { << 278 if (withWidth){
285 if (withWidth) { << 279 G4double maxDev = (parentmass - sumofdaughtermass )/std::sqrt(sumofdaughterwidthsq) ;
286 G4double maxDev = (parentmass - sumofdau << 280 if (maxDev < -0.9*rangeMass ){
287 if (maxDev <= -1.0 * rangeMass) { << 281 #ifdef G4VERBOSE
288 #ifdef G4VERBOSE << 282 if (GetVerboseLevel()>0) {
289 if (GetVerboseLevel() > 0) { << 283 G4cout << "G4PhaseSpaceDecayChannel::ThreeBodyDecayIt "
290 G4cout << "G4PhaseSpaceDecayChannel: << 284 << "sum of daughter mass is larger than parent mass" << G4endl;
291 << "Sum of daughter mass is l << 285 G4cout << "parent :" << G4MT_parent->GetParticleName() << " " << current_parent_mass/GeV << G4endl;
292 G4cout << "Parent :" << G4MT_parent- << 286 G4cout << "daughter 1 :" << G4MT_daughters[0]->GetParticleName() << " " << daughtermass[0]/GeV << G4endl;
293 << current_parent_mass.Get() << 287 G4cout << "daughter 2:" << G4MT_daughters[1]->GetParticleName() << " " << daughtermass[1]/GeV << G4endl;
294 G4cout << "Daughter 1 :" << G4MT_dau << 288 G4cout << "daughter 3:" << G4MT_daughters[2]->GetParticleName() << " " << daughtermass[2]/GeV << G4endl;
295 << daughtermass[0] / GeV << G << 289 }
296 G4cout << "Daughter 2:" << G4MT_daug << 290 #endif
297 << daughtermass[1] / GeV << G << 291 G4Exception("G4PhaseSpaceDecayChannel::ThreeBodyDecayIt",
298 G4cout << "Daughter 3:" << G4MT_daug << 292 "PART112", JustWarning,
299 << daughtermass[2] / GeV << G << 293 "Can not create decay products: sum of daughter mass is larger than parent mass");
300 } << 294 return products;
301 #endif << 295 }
302 G4Exception("G4PhaseSpaceDecayChannel: << 296 G4double dm1= DynamicalMass(daughtermass[0],daughterwidth[0], maxDev);
303 "Cannot create decay produ << 297 G4double dm2= DynamicalMass(daughtermass[1],daughterwidth[1], maxDev);
304 is larger than parent mas << 298 G4double dm3= DynamicalMass(daughtermass[2],daughterwidth[2], maxDev);
305 return products; << 299 while (dm1+dm2+dm3>parentmass){
306 } << 300 dm1= DynamicalMass(daughtermass[0],daughterwidth[0], maxDev);
307 G4double dm1 = daughtermass[0]; << 301 dm2= DynamicalMass(daughtermass[1],daughterwidth[1], maxDev);
308 if (daughterwidth[0] > 0.) dm1 = Dynamic << 302 dm3= DynamicalMass(daughtermass[2],daughterwidth[2], maxDev);
309 G4double dm2 = daughtermass[1]; << 303 }
310 if (daughterwidth[1] > 0.) dm2 = Dynamic << 304 daughtermass[0] = dm1;
311 G4double dm3 = daughtermass[2]; << 305 daughtermass[1] = dm2;
312 if (daughterwidth[2] > 0.) dm3 = Dynamic << 306 daughtermass[2] = dm3;
313 while (dm1 + dm2 + dm3 > parentmass) // << 307
314 { << 308 } else {
315 dm1 = DynamicalMass(daughtermass[0], d << 309 if (sumofdaughtermass >parentmass) {
316 dm2 = DynamicalMass(daughtermass[1], d << 310 #ifdef G4VERBOSE
317 dm3 = DynamicalMass(daughtermass[2], d << 311 if (GetVerboseLevel()>0) {
318 } << 312 G4cout << "G4PhaseSpaceDecayChannel::ThreeBodyDecayIt "
319 daughtermass[0] = dm1; << 313 << "sum of daughter mass is larger than parent mass" << G4endl;
320 daughtermass[1] = dm2; << 314 G4cout << "parent :" << G4MT_parent->GetParticleName() << " " << current_parent_mass/GeV << G4endl;
321 daughtermass[2] = dm3; << 315 G4cout << "daughter 1 :" << G4MT_daughters[0]->GetParticleName() << " " << daughtermass[0]/GeV << G4endl;
322 sumofdaughtermass = dm1 + dm2 + dm3; << 316 G4cout << "daughter 2:" << G4MT_daughters[1]->GetParticleName() << " " << daughtermass[1]/GeV << G4endl;
323 } << 317 G4cout << "daughter 3:" << G4MT_daughters[2]->GetParticleName() << " " << daughtermass[2]/GeV << G4endl;
324 } << 318 }
325 else { << 319 #endif
326 // use given daughter mass; << 320 G4Exception("G4PhaseSpaceDecayChannel::ThreeBodyDecayIt",
327 daughtermass[0] = givenDaughterMasses[0]; << 321 "PART112", JustWarning,
328 daughtermass[1] = givenDaughterMasses[1]; << 322 "Can not create decay products: sum of daughter mass is larger than parent mass");
329 daughtermass[2] = givenDaughterMasses[2]; << 323 return products;
330 sumofdaughtermass = daughtermass[0] + daug << 324 }
331 } <<
332 <<
333 if (sumofdaughtermass > parentmass) { <<
334 #ifdef G4VERBOSE <<
335 if (GetVerboseLevel() > 0) { <<
336 G4cout << "G4PhaseSpaceDecayChannel::Thr <<
337 << "Sum of daughter mass is large <<
338 G4cout << "Parent :" << G4MT_parent->Get <<
339 << current_parent_mass.Get() / Ge <<
340 G4cout << "Daughter 1 :" << G4MT_daughte <<
341 << daughtermass[0] / GeV << G4end <<
342 G4cout << "Daughter 2:" << G4MT_daughter <<
343 << daughtermass[1] / GeV << G4end <<
344 G4cout << "Daughter 3:" << G4MT_daughter <<
345 << daughtermass[2] / GeV << G4end <<
346 } <<
347 if (useGivenDaughterMass) { <<
348 G4cout << "Daughter Mass is given." << G <<
349 } <<
350 #endif <<
351 G4Exception("G4PhaseSpaceDecayChannel::Thr <<
352 "Can not create decay products <<
353 is larger than parent mass!") <<
354 return products; <<
355 } 325 }
356 326
357 // calculate daughter momentum << 327
358 // Generate two << 328
>> 329 //calculate daughter momentum
>> 330 // Generate two
359 G4double rd1, rd2, rd; 331 G4double rd1, rd2, rd;
360 G4double daughtermomentum[3]; 332 G4double daughtermomentum[3];
361 G4double momentummax = 0.0, momentumsum = 0. << 333 G4double momentummax=0.0, momentumsum = 0.0;
362 G4double energy; 334 G4double energy;
363 const std::size_t MAX_LOOP = 10000; <<
364 335
365 for (std::size_t loop_counter = 0; loop_coun << 336 do {
366 rd1 = G4UniformRand(); 337 rd1 = G4UniformRand();
367 rd2 = G4UniformRand(); 338 rd2 = G4UniformRand();
368 if (rd2 > rd1) { 339 if (rd2 > rd1) {
369 rd = rd1; << 340 rd = rd1;
370 rd1 = rd2; 341 rd1 = rd2;
371 rd2 = rd; 342 rd2 = rd;
372 } << 343 }
373 momentummax = 0.0; 344 momentummax = 0.0;
374 momentumsum = 0.0; 345 momentumsum = 0.0;
375 // daughter 0 346 // daughter 0
376 energy = rd2 * (parentmass - sumofdaughter << 347 energy = rd2*(parentmass - sumofdaughtermass);
377 daughtermomentum[0] = std::sqrt(energy * e << 348 daughtermomentum[0] = std::sqrt(energy*energy + 2.0*energy* daughtermass[0]);
378 if (daughtermomentum[0] > momentummax) mom << 349 if ( daughtermomentum[0] >momentummax )momentummax = daughtermomentum[0];
379 momentumsum += daughtermomentum[0]; << 350 momentumsum += daughtermomentum[0];
380 // daughter 1 351 // daughter 1
381 energy = (1. - rd1) * (parentmass - sumofd << 352 energy = (1.-rd1)*(parentmass - sumofdaughtermass);
382 daughtermomentum[1] = std::sqrt(energy * e << 353 daughtermomentum[1] = std::sqrt(energy*energy + 2.0*energy* daughtermass[1]);
383 if (daughtermomentum[1] > momentummax) mom << 354 if ( daughtermomentum[1] >momentummax )momentummax = daughtermomentum[1];
384 momentumsum += daughtermomentum[1]; << 355 momentumsum += daughtermomentum[1];
385 // daughter 2 356 // daughter 2
386 energy = (rd1 - rd2) * (parentmass - sumof << 357 energy = (rd1-rd2)*(parentmass - sumofdaughtermass);
387 daughtermomentum[2] = std::sqrt(energy * e << 358 daughtermomentum[2] = std::sqrt(energy*energy + 2.0*energy* daughtermass[2]);
388 if (daughtermomentum[2] > momentummax) mom << 359 if ( daughtermomentum[2] >momentummax )momentummax = daughtermomentum[2];
389 momentumsum += daughtermomentum[2]; << 360 momentumsum += daughtermomentum[2];
390 if (momentummax <= momentumsum - momentumm << 361 } while (momentummax > momentumsum - momentummax );
391 } <<
392 <<
393 // output message 362 // output message
394 #ifdef G4VERBOSE 363 #ifdef G4VERBOSE
395 if (GetVerboseLevel() > 1) { << 364 if (GetVerboseLevel()>1) {
396 G4cout << " daughter 0:" << daughtermo << 365 G4cout << " daughter 0:" << daughtermomentum[0]/GeV << "[GeV/c]" <<G4endl;
397 G4cout << " daughter 1:" << daughtermo << 366 G4cout << " daughter 1:" << daughtermomentum[1]/GeV << "[GeV/c]" <<G4endl;
398 G4cout << " daughter 2:" << daughtermo << 367 G4cout << " daughter 2:" << daughtermomentum[2]/GeV << "[GeV/c]" <<G4endl;
399 G4cout << " momentum sum:" << momentumsu << 368 G4cout << " momentum sum:" << momentumsum/GeV << "[GeV/c]" <<G4endl;
400 } 369 }
401 #endif 370 #endif
402 371
403 // create daughter G4DynamicParticle << 372 //create daughter G4DynamicParticle
404 G4double costheta, sintheta, phi, sinphi, co << 373 G4double costheta, sintheta, phi, sinphi, cosphi;
405 G4double costhetan, sinthetan, phin, sinphin << 374 G4double costhetan, sinthetan, phin, sinphin, cosphin;
406 costheta = 2. * G4UniformRand() - 1.0; << 375 costheta = 2.*G4UniformRand()-1.0;
407 sintheta = std::sqrt((1.0 - costheta) * (1.0 << 376 sintheta = std::sqrt((1.0-costheta)*(1.0+costheta));
408 phi = twopi * G4UniformRand() * rad; << 377 phi = twopi*G4UniformRand()*rad;
409 sinphi = std::sin(phi); 378 sinphi = std::sin(phi);
410 cosphi = std::cos(phi); 379 cosphi = std::cos(phi);
411 380
412 G4ThreeVector direction0(sintheta * cosphi, << 381 G4ThreeVector direction0(sintheta*cosphi,sintheta*sinphi,costheta);
413 G4double Ekin = << 382 G4double Ekin = std::sqrt(daughtermomentum[0]*daughtermomentum[0] + daughtermass[0]*daughtermass[0]) - daughtermass[0];
414 std::sqrt(daughtermomentum[0] * daughtermo << 383 G4DynamicParticle * daughterparticle = new G4DynamicParticle( G4MT_daughters[0],
415 - daughtermass[0]; << 384 direction0,
416 auto daughterparticle = << 385 Ekin, daughtermass[0]);
417 new G4DynamicParticle(G4MT_daughters[0], d <<
418 products->PushProducts(daughterparticle); 386 products->PushProducts(daughterparticle);
419 387
420 costhetan = (daughtermomentum[1] * daughterm << 388 costhetan = (daughtermomentum[1]*daughtermomentum[1]-daughtermomentum[2]*daughtermomentum[2]-daughtermomentum[0]*daughtermomentum[0])/(2.0*daughtermomentum[2]*daughtermomentum[0]);
421 - daughtermomentum[0] * daughte << 389 sinthetan = std::sqrt((1.0-costhetan)*(1.0+costhetan));
422 / (2.0 * daughtermomentum[2] * d << 390 phin = twopi*G4UniformRand()*rad;
423 sinthetan = std::sqrt((1.0 - costhetan) * (1 <<
424 phin = twopi * G4UniformRand() * rad; <<
425 sinphin = std::sin(phin); 391 sinphin = std::sin(phin);
426 cosphin = std::cos(phin); 392 cosphin = std::cos(phin);
427 G4ThreeVector direction2; 393 G4ThreeVector direction2;
428 direction2.setX(sinthetan * cosphin * costhe << 394 direction2.setX( sinthetan*cosphin*costheta*cosphi - sinthetan*sinphin*sinphi + costhetan*sintheta*cosphi);
429 + costhetan * sintheta * cos << 395 direction2.setY( sinthetan*cosphin*costheta*sinphi + sinthetan*sinphin*cosphi + costhetan*sintheta*sinphi);
430 direction2.setY(sinthetan * cosphin * costhe << 396 direction2.setZ( -sinthetan*cosphin*sintheta + costhetan*costheta);
431 + costhetan * sintheta * sin << 397 G4ThreeVector pmom = daughtermomentum[2]*direction2/direction2.mag();
432 direction2.setZ(-sinthetan * cosphin * sinth << 398 Ekin = std::sqrt(pmom.mag2() + daughtermass[2]*daughtermass[2]) - daughtermass[2];
433 G4ThreeVector pmom = daughtermomentum[2] * d << 399 daughterparticle = new G4DynamicParticle( G4MT_daughters[2],
434 Ekin = std::sqrt(pmom.mag2() + daughtermass[ << 400 pmom/pmom.mag(),
435 daughterparticle = << 401 Ekin, daughtermass[2]);
436 new G4DynamicParticle(G4MT_daughters[2], p <<
437 products->PushProducts(daughterparticle); 402 products->PushProducts(daughterparticle);
438 403
439 pmom = (direction0 * daughtermomentum[0] + d << 404 pmom = (direction0*daughtermomentum[0] + direction2*(daughtermomentum[2]/direction2.mag()))*(-1.0);
440 * (-1.0); << 405 Ekin = std::sqrt(pmom.mag2() + daughtermass[1]*daughtermass[1]) - daughtermass[1];
441 Ekin = std::sqrt(pmom.mag2() + daughtermass[ << 406 daughterparticle = new G4DynamicParticle(
442 daughterparticle = << 407 G4MT_daughters[1],
443 new G4DynamicParticle(G4MT_daughters[1], p << 408 pmom/pmom.mag(),
>> 409 Ekin, daughtermass[1]);
444 products->PushProducts(daughterparticle); 410 products->PushProducts(daughterparticle);
445 << 411
446 #ifdef G4VERBOSE 412 #ifdef G4VERBOSE
447 if (GetVerboseLevel() > 1) { << 413 if (GetVerboseLevel()>1) {
448 G4cout << "G4PhaseSpaceDecayChannel::Three << 414 G4cout << "G4PhaseSpaceDecayChannel::ThreeBodyDecayIt ";
449 G4cout << " create decay products in rest << 415 G4cout << " create decay products in rest frame " <<G4endl;
450 products->DumpInfo(); << 416 products->DumpInfo();
451 } 417 }
452 #endif 418 #endif
453 return products; 419 return products;
454 } 420 }
455 421
456 G4DecayProducts* G4PhaseSpaceDecayChannel::Man << 422 G4DecayProducts *G4PhaseSpaceDecayChannel::ManyBodyDecayIt()
>> 423 // algorithm of this code is originally written in FORTRAN by M.Asai
>> 424 //******************************************************************
>> 425 // NBODY
>> 426 // N-body phase space Monte-Carlo generator
>> 427 // Makoto Asai
>> 428 // Hiroshima Institute of Technology
>> 429 // (asai@kekvax.kek.jp)
>> 430 // Revised release : 19/Apr/1995
>> 431 //
457 { 432 {
458 // Algorithm of this code originally written <<
459 // ***************************************** <<
460 // NBODY - N-body phase space Monte-Carlo ge <<
461 // Makoto Asai - Hiroshima Institute of Tech <<
462 // Revised release : 19/Apr/1995 <<
463 <<
464 G4int index, index2; 433 G4int index, index2;
465 434
>> 435 //return value
>> 436 G4DecayProducts *products;
>> 437
466 #ifdef G4VERBOSE 438 #ifdef G4VERBOSE
467 if (GetVerboseLevel() > 1) G4cout << "G4Phas << 439 if (GetVerboseLevel()>1) G4cout << "G4PhaseSpaceDecayChannel::ManyBodyDecayIt()"<<G4endl;
468 #endif 440 #endif
469 <<
470 // parent mass 441 // parent mass
471 G4double parentmass = current_parent_mass.Ge << 442 G4double parentmass = current_parent_mass;
472 << 443 //daughters'mass
473 // parent particle << 444 G4double *daughtermass = new G4double[numberOfDaughters];
474 G4ThreeVector dummy; <<
475 auto parentparticle = new G4DynamicParticle( <<
476 <<
477 // create G4Decayproducts <<
478 auto products = new G4DecayProducts(*parentp <<
479 delete parentparticle; <<
480 <<
481 // daughters'mass <<
482 auto daughtermass = new G4double[numberOfDau <<
483 <<
484 G4double sumofdaughtermass = 0.0; 445 G4double sumofdaughtermass = 0.0;
485 for (index = 0; index < numberOfDaughters; + << 446 for (index=0; index<numberOfDaughters; index++){
486 if (!useGivenDaughterMass) { << 447 daughtermass[index] = G4MT_daughters_mass[index];
487 daughtermass[index] = G4MT_daughters_mas <<
488 } <<
489 else { <<
490 daughtermass[index] = givenDaughterMasse <<
491 } <<
492 sumofdaughtermass += daughtermass[index]; 448 sumofdaughtermass += daughtermass[index];
493 } 449 }
494 if (sumofdaughtermass > parentmass) { << 450
495 #ifdef G4VERBOSE << 451 //Calculate daughter momentum
496 if (GetVerboseLevel() > 0) { << 452 G4double *daughtermomentum = new G4double[numberOfDaughters];
497 G4cout << "G4PhaseSpaceDecayChannel::Man << 453 G4ThreeVector direction;
498 << "Sum of daughter mass is large << 454 G4DynamicParticle **daughterparticle;
499 G4cout << "Parent :" << G4MT_parent->Get << 455 G4double *sm = new G4double[numberOfDaughters];
500 << current_parent_mass.Get() / Ge <<
501 G4cout << "Daughter 1 :" << G4MT_daughte <<
502 << daughtermass[0] / GeV << G4end <<
503 G4cout << "Daughter 2:" << G4MT_daughter <<
504 << daughtermass[1] / GeV << G4end <<
505 G4cout << "Daughter 3:" << G4MT_daughter <<
506 << daughtermass[2] / GeV << G4end <<
507 G4cout << "Daughter 4:" << G4MT_daughter <<
508 << daughtermass[3] / GeV << G4end <<
509 G4cout << "Daughter 5:" << G4MT_daughter <<
510 << daughtermass[4] / GeV << G4end <<
511 } <<
512 #endif <<
513 G4Exception("G4PhaseSpaceDecayChannel::Man <<
514 "Can not create decay products <<
515 is larger than parent mass!") <<
516 delete[] daughtermass; <<
517 return products; <<
518 } <<
519 <<
520 // Calculate daughter momentum <<
521 auto daughtermomentum = new G4double[numberO <<
522 G4ThreeVector direction; <<
523 G4DynamicParticle** daughterparticle; <<
524 auto sm = new G4double[numberOfDaughters]; <<
525 G4double tmas; 456 G4double tmas;
526 G4double weight = 1.0; 457 G4double weight = 1.0;
527 G4int numberOfTry = 0; << 458 G4int numberOfTry = 0;
528 const std::size_t MAX_LOOP = 10000; << 459
529 << 460 do {
530 for (std::size_t loop_counter = 0; loop_coun << 461 //Generate rundom number in descending order
531 // Generate rundom number in descending or <<
532 G4double temp; 462 G4double temp;
533 auto rd = new G4double[numberOfDaughters]; << 463 G4double *rd = new G4double[numberOfDaughters];
534 rd[0] = 1.0; 464 rd[0] = 1.0;
535 for (index = 1; index < numberOfDaughters << 465 for(index =1; index < numberOfDaughters -1; index++) rd[index] = G4UniformRand();
536 rd[index] = G4UniformRand(); << 466 rd[ numberOfDaughters -1] = 0.0;
537 } << 467 for(index =1; index < numberOfDaughters -1; index++) {
538 rd[numberOfDaughters - 1] = 0.0; << 468 for(index2 = index+1; index2 < numberOfDaughters; index2++) {
539 for (index = 1; index < numberOfDaughters << 469 if (rd[index] < rd[index2]){
540 for (index2 = index + 1; index2 < number << 470 temp = rd[index];
541 if (rd[index] < rd[index2]) { << 471 rd[index] = rd[index2];
542 temp = rd[index]; <<
543 rd[index] = rd[index2]; <<
544 rd[index2] = temp; 472 rd[index2] = temp;
545 } 473 }
546 } 474 }
547 } 475 }
548 << 476
549 // calculate virtual mass << 477 //calcurate virtual mass
550 tmas = parentmass - sumofdaughtermass; << 478 tmas = parentmass - sumofdaughtermass;
551 temp = sumofdaughtermass; << 479 temp = sumofdaughtermass;
552 for (index = 0; index < numberOfDaughters; << 480 for(index =0; index < numberOfDaughters; index++) {
553 sm[index] = rd[index] * tmas + temp; << 481 sm[index] = rd[index]*tmas + temp;
554 temp -= daughtermass[index]; 482 temp -= daughtermass[index];
555 if (GetVerboseLevel() > 1) { << 483 if (GetVerboseLevel()>1) {
556 G4cout << index << " rundom number:" << 484 G4cout << index << " rundom number:" << rd[index];
557 G4cout << " virtual mass:" << sm[ind << 485 G4cout << " virtual mass:" << sm[index]/GeV << "[GeV/c/c]" <<G4endl;
558 } 486 }
559 } 487 }
560 delete[] rd; << 488 delete [] rd;
561 489
562 // Calculate daughter momentum << 490 //Calculate daughter momentum
563 weight = 1.0; 491 weight = 1.0;
564 G4bool smOK = true; << 492 index =numberOfDaughters-1;
565 for (index = 0; index < numberOfDaughters << 493 daughtermomentum[index]= Pmx( sm[index-1],daughtermass[index-1], sm[index]);
566 smOK = (sm[index] - daughtermass[index] <<
567 } <<
568 if (!smOK) continue; <<
569 <<
570 index = numberOfDaughters - 1; <<
571 daughtermomentum[index] = Pmx(sm[index - 1 <<
572 #ifdef G4VERBOSE 494 #ifdef G4VERBOSE
573 if (GetVerboseLevel() > 1) { << 495 if (GetVerboseLevel()>1) {
574 G4cout << " daughter " << index << " 496 G4cout << " daughter " << index << ":" << *daughters_name[index];
575 G4cout << " momentum:" << daughtermoment << 497 G4cout << " momentum:" << daughtermomentum[index]/GeV << "[GeV/c]" <<G4endl;
576 } 498 }
577 #endif 499 #endif
578 for (index = numberOfDaughters - 2; index << 500 for(index =numberOfDaughters-2; index>=0; index--) {
579 // calculate << 501 // calculate
580 daughtermomentum[index] = Pmx(sm[index], << 502 daughtermomentum[index]= Pmx( sm[index],daughtermass[index], sm[index +1]);
581 if (daughtermomentum[index] < 0.0) { << 503 if(daughtermomentum[index] < 0.0) {
582 // !!! illegal momentum !!! 504 // !!! illegal momentum !!!
583 #ifdef G4VERBOSE 505 #ifdef G4VERBOSE
584 if (GetVerboseLevel() > 0) { << 506 if (GetVerboseLevel()>0) {
585 G4cout << "G4PhaseSpaceDecayChannel: << 507 G4cout << "G4PhaseSpaceDecayChannel::ManyBodyDecayIt ";
586 G4cout << " Cannot calculate dau << 508 G4cout << " can not calculate daughter momentum " <<G4endl;
587 G4cout << " parent:" << *parent_ 509 G4cout << " parent:" << *parent_name;
588 G4cout << " mass:" << parentmass / G << 510 G4cout << " mass:" << parentmass/GeV << "[GeV/c/c]" <<G4endl;
589 G4cout << " daughter " << index 511 G4cout << " daughter " << index << ":" << *daughters_name[index];
590 G4cout << " mass:" << daughtermass[i << 512 G4cout << " mass:" << daughtermass[index]/GeV << "[GeV/c/c]" ;
591 G4cout << " mass:" << daughtermoment << 513 G4cout << " mass:" << daughtermomentum[index]/GeV << "[GeV/c]" <<G4endl;
592 if (useGivenDaughterMass) { <<
593 G4cout << "Daughter Mass is given. <<
594 } <<
595 } 514 }
596 #endif 515 #endif
597 delete[] sm; << 516 delete [] sm;
598 delete[] daughtermass; << 517 delete [] daughtermass;
599 delete[] daughtermomentum; << 518 delete [] daughtermomentum;
600 delete products; <<
601 G4Exception("G4PhaseSpaceDecayChannel: <<
602 "Can not create decay prod <<
603 is larger than parent mas <<
604 return nullptr; // Error detection <<
605 } <<
606 519
607 // calculate weight of this events << 520 G4Exception("G4PhaseSpaceDecayChannel::ManyBodyDecayIt",
608 weight *= daughtermomentum[index] / sm[i << 521 "PART112", JustWarning,
>> 522 "Can not create decay products: sum of daughter mass is larger than parent mass");
>> 523
>> 524 return 0; // Error detection
>> 525
>> 526 } else {
>> 527 // calculate weight of this events
>> 528 weight *= daughtermomentum[index]/sm[index];
609 #ifdef G4VERBOSE 529 #ifdef G4VERBOSE
610 if (GetVerboseLevel() > 1) { << 530 if (GetVerboseLevel()>1) {
611 G4cout << " daughter " << index << << 531 G4cout << " daughter " << index << ":" << *daughters_name[index];
612 G4cout << " momentum:" << daughtermome << 532 G4cout << " momentum:" << daughtermomentum[index]/GeV << "[GeV/c]" <<G4endl;
613 } << 533 }
614 #endif 534 #endif
>> 535 }
615 } 536 }
616 537
617 #ifdef G4VERBOSE 538 #ifdef G4VERBOSE
618 if (GetVerboseLevel() > 1) { << 539 if (GetVerboseLevel()>1) {
619 G4cout << " weight: " << weight << G4 << 540 G4cout << " weight: " << weight <<G4endl;
620 } 541 }
621 #endif 542 #endif
622 << 543
623 // exit if number of Try exceeds 100 544 // exit if number of Try exceeds 100
624 if (++numberOfTry > 100) { << 545 if (numberOfTry++ >100) {
625 #ifdef G4VERBOSE 546 #ifdef G4VERBOSE
626 if (GetVerboseLevel() > 0) { << 547 if (GetVerboseLevel()>0) {
627 G4cout << "G4PhaseSpaceDecayChannel::M << 548 G4cout << "G4PhaseSpaceDecayChannel::ManyBodyDecayIt: ";
628 G4cout << "Cannot determine Decay Kine << 549 G4cout << " can not determine Decay Kinematics " << G4endl;
629 G4cout << "parent : " << *parent_name << 550 G4cout << "parent : " << *parent_name << G4endl;
630 G4cout << "daughters : "; << 551 G4cout << "daughters : ";
631 for (index = 0; index < numberOfDaught << 552 for(index=0; index<numberOfDaughters; index++) {
632 G4cout << *daughters_name[index] << << 553 G4cout << *daughters_name[index] << " , ";
633 } << 554 }
634 G4cout << G4endl; << 555 G4cout << G4endl;
635 } << 556 }
636 #endif << 557 #endif
637 G4Exception("G4PhaseSpaceDecayChannel::M << 558 G4Exception("G4PhaseSpaceDecayChannel::ManyBodyDecayIt: ",
638 "Cannot decay: Decay Kinemat << 559 "PART113", JustWarning,
639 << 560 " Cannot decay : Decay Kinematics cannot be calculated ");
640 delete[] sm; << 561
641 delete[] daughtermass; << 562 delete [] sm;
642 delete[] daughtermomentum; << 563 delete [] daughtermass;
643 delete products; << 564 delete [] daughtermomentum;
644 return nullptr; // Error detection << 565 return 0; // Error detection
645 } 566 }
646 if (weight < G4UniformRand()) break; << 567 } while ( weight > G4UniformRand());
647 } <<
648 568
649 #ifdef G4VERBOSE 569 #ifdef G4VERBOSE
650 if (GetVerboseLevel() > 1) { << 570 if (GetVerboseLevel()>1) {
651 G4cout << "Start calculation of daughters << 571 G4cout << "Start calulation of daughters momentum vector "<<G4endl;
652 } 572 }
653 #endif << 573 #endif
654 << 574
655 G4double costheta, sintheta, phi; 575 G4double costheta, sintheta, phi;
656 G4double beta; 576 G4double beta;
657 daughterparticle = new G4DynamicParticle*[nu 577 daughterparticle = new G4DynamicParticle*[numberOfDaughters];
658 578
659 index = numberOfDaughters - 2; << 579 index = numberOfDaughters -2;
660 costheta = 2. * G4UniformRand() - 1.0; << 580 costheta = 2.*G4UniformRand()-1.0;
661 sintheta = std::sqrt((1.0 - costheta) * (1.0 << 581 sintheta = std::sqrt((1.0-costheta)*(1.0+costheta));
662 phi = twopi * G4UniformRand() * rad; << 582 phi = twopi*G4UniformRand()*rad;
663 direction.setZ(costheta); 583 direction.setZ(costheta);
664 direction.setY(sintheta * std::sin(phi)); << 584 direction.setY(sintheta*std::sin(phi));
665 direction.setX(sintheta * std::cos(phi)); << 585 direction.setX(sintheta*std::cos(phi));
666 daughterparticle[index] = << 586 daughterparticle[index] = new G4DynamicParticle( G4MT_daughters[index], direction*daughtermomentum[index] );
667 new G4DynamicParticle(G4MT_daughters[index << 587 daughterparticle[index+1] = new G4DynamicParticle( G4MT_daughters[index+1], direction*(-1.0*daughtermomentum[index]) );
668 daughterparticle[index + 1] = << 588
669 new G4DynamicParticle(G4MT_daughters[index << 589 for (index = numberOfDaughters -3; index >= 0; index--) {
670 << 590 //calculate momentum direction
671 for (index = numberOfDaughters - 3; index >= << 591 costheta = 2.*G4UniformRand()-1.0;
672 // calculate momentum direction << 592 sintheta = std::sqrt((1.0-costheta)*(1.0+costheta));
673 costheta = 2. * G4UniformRand() - 1.0; << 593 phi = twopi*G4UniformRand()*rad;
674 sintheta = std::sqrt((1.0 - costheta) * (1 <<
675 phi = twopi * G4UniformRand() * rad; <<
676 direction.setZ(costheta); 594 direction.setZ(costheta);
677 direction.setY(sintheta * std::sin(phi)); << 595 direction.setY(sintheta*std::sin(phi));
678 direction.setX(sintheta * std::cos(phi)); << 596 direction.setX(sintheta*std::cos(phi));
679 597
680 // boost already created particles << 598 // boost already created particles
681 beta = daughtermomentum[index]; 599 beta = daughtermomentum[index];
682 beta /= << 600 beta /= std::sqrt( daughtermomentum[index]*daughtermomentum[index] + sm[index+1]*sm[index+1] );
683 std::sqrt(daughtermomentum[index] * daug << 601 for (index2 = index+1; index2<numberOfDaughters; index2++) {
684 for (index2 = index + 1; index2 < numberOf <<
685 G4LorentzVector p4; 602 G4LorentzVector p4;
686 // make G4LorentzVector for secondaries 603 // make G4LorentzVector for secondaries
687 p4 = daughterparticle[index2]->Get4Momen 604 p4 = daughterparticle[index2]->Get4Momentum();
688 605
689 // boost secondaries to new frame << 606 // boost secondaries to new frame
690 p4.boost(direction.x() * beta, direction << 607 p4.boost( direction.x()*beta, direction.y()*beta, direction.z()*beta);
691 608
692 // change energy/momentum 609 // change energy/momentum
693 daughterparticle[index2]->Set4Momentum(p 610 daughterparticle[index2]->Set4Momentum(p4);
694 } 611 }
695 // create daughter G4DynamicParticle << 612 //create daughter G4DynamicParticle
696 daughterparticle[index] = << 613 daughterparticle[index]= new G4DynamicParticle( G4MT_daughters[index], direction*(-1.0*daughtermomentum[index]));
697 new G4DynamicParticle(G4MT_daughters[ind <<
698 } 614 }
699 615
700 // add daughters to G4Decayproducts << 616 //create G4Decayproducts
701 for (index = 0; index < numberOfDaughters; + << 617 G4DynamicParticle *parentparticle;
>> 618 direction.setX(1.0); direction.setY(0.0); direction.setZ(0.0);
>> 619 parentparticle = new G4DynamicParticle( G4MT_parent, direction, 0.0, parentmass);
>> 620 products = new G4DecayProducts(*parentparticle);
>> 621 delete parentparticle;
>> 622 for (index = 0; index<numberOfDaughters; index++) {
702 products->PushProducts(daughterparticle[in 623 products->PushProducts(daughterparticle[index]);
703 } 624 }
704 625
705 #ifdef G4VERBOSE 626 #ifdef G4VERBOSE
706 if (GetVerboseLevel() > 1) { << 627 if (GetVerboseLevel()>1) {
707 G4cout << "G4PhaseSpaceDecayChannel::ManyB << 628 G4cout << "G4PhaseSpaceDecayChannel::ManyBodyDecayIt ";
708 G4cout << " create decay products in rest << 629 G4cout << " create decay products in rest frame " << G4endl;
709 products->DumpInfo(); 630 products->DumpInfo();
710 } 631 }
711 #endif 632 #endif
712 633
713 delete[] daughterparticle; << 634 delete [] daughterparticle;
714 delete[] daughtermomentum; << 635 delete [] daughtermomentum;
715 delete[] daughtermass; << 636 delete [] daughtermass;
716 delete[] sm; << 637 delete [] sm;
717 << 638
718 return products; 639 return products;
719 } 640 }
720 641
721 G4bool G4PhaseSpaceDecayChannel::SetDaughterMa <<
722 { <<
723 for (G4int idx = 0; idx < numberOfDaughters; <<
724 givenDaughterMasses[idx] = masses[idx]; <<
725 } <<
726 useGivenDaughterMass = true; <<
727 return useGivenDaughterMass; <<
728 } <<
729 642
730 G4bool G4PhaseSpaceDecayChannel::SampleDaughte << 643 G4double G4PhaseSpaceDecayChannel::Pmx(G4double e, G4double p1, G4double p2)
731 { 644 {
732 useGivenDaughterMass = false; << 645 // calcurate momentum of daughter particles in two-body decay
733 return useGivenDaughterMass; << 646 G4double ppp = (e+p1+p2)*(e+p1-p2)*(e-p1+p2)*(e-p1-p2)/(4.0*e*e);
>> 647 if (ppp>0) return std::sqrt(ppp);
>> 648 else return -1.;
734 } 649 }
735 650
736 G4bool G4PhaseSpaceDecayChannel::IsOKWithParen <<
737 { <<
738 if (!useGivenDaughterMass) return G4VDecayCh <<
739 <<
740 CheckAndFillParent(); <<
741 CheckAndFillDaughters(); <<
742 651
743 G4double sumOfDaughterMassMin = 0.0; <<
744 for (G4int index = 0; index < numberOfDaught <<
745 sumOfDaughterMassMin += givenDaughterMasse <<
746 } <<
747 return (parentMass >= sumOfDaughterMassMin); <<
748 } <<
749 652
750 G4double G4PhaseSpaceDecayChannel::Pmx(G4doubl <<
751 { <<
752 // calcurate momentum of daughter particles <<
753 G4double ppp = (e + p1 + p2) * (e + p1 - p2) <<
754 if (ppp > 0) return std::sqrt(ppp); <<
755 return -1.; <<
756 } <<
757 653