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>> 1 // This code implementation is the intellectual property of
>> 2 // the GEANT4 collaboration.
1 // 3 //
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17 // * <<
18 // * This code implementation is the result <<
19 // * technical work of the GEANT4 collaboratio <<
20 // * By using, copying, modifying or distri <<
21 // * any work based on the software) you ag <<
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24 // ******************************************* <<
25 // 7 //
26 // G4PhaseSpaceDecayChannel class implementati << 8 // $Id: G4PhaseSpaceDecayChannel.cc,v 1.4 1999/12/15 14:51:15 gunter Exp $
>> 9 // GEANT4 tag $Name: geant4-02-00 $
27 // 10 //
28 // Author: H.Kurashige, 27 July 1996 << 11 //
29 // ------------------------------------------- << 12 // ------------------------------------------------------------
30 << 13 // GEANT 4 class header file
31 #include "G4PhaseSpaceDecayChannel.hh" << 14 //
>> 15 // For information related to this code contact:
>> 16 // CERN, CN Division, ASD group
>> 17 // History: first implementation, based on object model of
>> 18 // 27 July 1996 H.Kurashige
>> 19 // 20 Oct 1996 H.Kurashige
>> 20 // 30 May 1997 H.Kurashige
>> 21 // ------------------------------------------------------------
32 22
33 #include "G4DecayProducts.hh" <<
34 #include "G4LorentzRotation.hh" <<
35 #include "G4LorentzVector.hh" <<
36 #include "G4ParticleDefinition.hh" 23 #include "G4ParticleDefinition.hh"
37 #include "G4PhysicalConstants.hh" << 24 #include "G4DecayProducts.hh"
38 #include "G4SystemOfUnits.hh" <<
39 #include "G4VDecayChannel.hh" 25 #include "G4VDecayChannel.hh"
>> 26 #include "G4PhaseSpaceDecayChannel.hh"
40 #include "Randomize.hh" 27 #include "Randomize.hh"
>> 28 #include "G4LorentzVector.hh"
>> 29 #include "G4LorentzRotation.hh"
>> 30
41 31
42 G4PhaseSpaceDecayChannel::G4PhaseSpaceDecayCha 32 G4PhaseSpaceDecayChannel::G4PhaseSpaceDecayChannel(G4int Verbose)
43 : G4VDecayChannel("Phase Space", Verbose) << 33 :G4VDecayChannel("Phase Space", Verbose)
44 {} << 34 {
45 35
46 G4PhaseSpaceDecayChannel::G4PhaseSpaceDecayCha << 36 }
47 <<
48 <<
49 <<
50 <<
51 <<
52 <<
53 : G4VDecayChannel("Phase Space", theParentNa <<
54 theDaughterName2, theDaugh <<
55 {} <<
56 37
57 G4DecayProducts* G4PhaseSpaceDecayChannel::Dec << 38 G4PhaseSpaceDecayChannel::G4PhaseSpaceDecayChannel(
>> 39 const G4String& theParentName,
>> 40 G4double theBR,
>> 41 G4int theNumberOfDaughters,
>> 42 const G4String& theDaughterName1,
>> 43 const G4String& theDaughterName2,
>> 44 const G4String& theDaughterName3,
>> 45 const G4String& theDaughterName4 )
>> 46 :G4VDecayChannel("Phase Space",
>> 47 theParentName,theBR,
>> 48 theNumberOfDaughters,
>> 49 theDaughterName1,
>> 50 theDaughterName2,
>> 51 theDaughterName3,
>> 52 theDaughterName4)
58 { 53 {
59 #ifdef G4VERBOSE <<
60 if (GetVerboseLevel() > 1) G4cout << "G4Phas <<
61 #endif <<
62 <<
63 G4DecayProducts* products = nullptr; <<
64 54
65 CheckAndFillParent(); << 55 }
66 CheckAndFillDaughters(); <<
67 56
68 if (parentMass > 0.0) << 57 G4PhaseSpaceDecayChannel::~G4PhaseSpaceDecayChannel()
69 current_parent_mass.Put(parentMass); << 58 {
70 else << 59 }
71 current_parent_mass.Put(G4MT_parent_mass); <<
72 60
73 switch (numberOfDaughters) { << 61 G4DecayProducts *G4PhaseSpaceDecayChannel::DecayIt(G4double parentMass)
74 case 0: << 62 {
75 #ifdef G4VERBOSE 63 #ifdef G4VERBOSE
76 if (GetVerboseLevel() > 0) { << 64 if (GetVerboseLevel()>1) G4cout << "G4PhaseSpaceDecayChannel::DecayIt ";
77 G4cout << "G4PhaseSpaceDecayChannel::D <<
78 G4cout << " daughters not defined " << <<
79 } <<
80 #endif 65 #endif
81 break; << 66
82 case 1: << 67 G4DecayProducts * products = 0;
83 products = OneBodyDecayIt(); << 68
84 break; << 69 if (parent == 0) FillParent();
85 case 2: << 70 if (daughters == 0) FillDaughters();
86 products = TwoBodyDecayIt(); << 71
87 break; << 72 if (parentMass >0.0) parent_mass = parentMass;
88 case 3: << 73 switch (numberOfDaughters){
89 products = ThreeBodyDecayIt(); << 74 case 0:
90 break; << 75 #ifdef G4VERBOSE
91 default: << 76 if (GetVerboseLevel()>0) {
92 products = ManyBodyDecayIt(); << 77 G4cout << "G4PhaseSpaceDecayChannel::DecayIt ";
93 break; << 78 G4cout << " daughters not defined " <<G4endl;
94 } << 79 }
95 #ifdef G4VERBOSE << 80 #endif
96 if ((products == nullptr) && (GetVerboseLeve << 81 break;
97 G4cout << "G4PhaseSpaceDecayChannel::Decay << 82 case 1:
98 G4cout << *parent_name << " cannot decay " << 83 products = OneBodyDecayIt();
>> 84 break;
>> 85 case 2:
>> 86 products = TwoBodyDecayIt();
>> 87 break;
>> 88 case 3:
>> 89 products = ThreeBodyDecayIt();
>> 90 break;
>> 91 default:
>> 92 products = ManyBodyDecayIt();
>> 93 break;
>> 94 }
>> 95 #ifdef G4VERBOSE
>> 96 if ((products == 0) && (GetVerboseLevel()>0)) {
>> 97 G4cout << "G4PhaseSpaceDecayChannel::DecayIt ";
>> 98 G4cout << *parent_name << " can not decay " << G4endl;
99 DumpInfo(); 99 DumpInfo();
100 } 100 }
101 #endif 101 #endif
102 return products; 102 return products;
103 } 103 }
104 104
105 G4DecayProducts* G4PhaseSpaceDecayChannel::One << 105 G4DecayProducts *G4PhaseSpaceDecayChannel::OneBodyDecayIt()
106 { 106 {
107 #ifdef G4VERBOSE 107 #ifdef G4VERBOSE
108 if (GetVerboseLevel() > 1) G4cout << "G4Phas << 108 if (GetVerboseLevel()>1) G4cout << "G4PhaseSpaceDecayChannel::OneBodyDecayIt()"<<G4endl;
109 #endif 109 #endif
110 // parent mass << 110 G4double parentmass = parent_mass;
111 G4double parentmass = current_parent_mass.Ge << 111 G4double daughtermass = daughters_mass[0];
112 112
113 // create parent G4DynamicParticle at rest << 113 //create parent G4DynamicParticle at rest
114 G4ThreeVector dummy; 114 G4ThreeVector dummy;
115 auto parentparticle = new G4DynamicParticle( << 115 G4DynamicParticle * parentparticle = new G4DynamicParticle( parent, dummy, 0.0);
116 // create G4Decayproducts << 116 //create G4Decayproducts
117 auto products = new G4DecayProducts(*parentp << 117 G4DecayProducts *products = new G4DecayProducts(*parentparticle);
118 delete parentparticle; 118 delete parentparticle;
119 119
120 // create daughter G4DynamicParticle at rest << 120 //create daughter G4DynamicParticle at rest
121 auto daughterparticle = new G4DynamicParticl << 121 G4DynamicParticle * daughterparticle = new G4DynamicParticle( daughters[0], dummy, 0.0);
122 if (useGivenDaughterMass) daughterparticle-> <<
123 products->PushProducts(daughterparticle); 122 products->PushProducts(daughterparticle);
124 123
125 #ifdef G4VERBOSE 124 #ifdef G4VERBOSE
126 if (GetVerboseLevel() > 1) { << 125 if (GetVerboseLevel()>1) {
127 G4cout << "G4PhaseSpaceDecayChannel::OneBo << 126 G4cout << "G4PhaseSpaceDecayChannel::OneBodyDecayIt ";
128 G4cout << " create decay products in rest << 127 G4cout << " create decay products in rest frame " <<G4endl;
129 products->DumpInfo(); << 128 products->DumpInfo();
130 } 129 }
131 #endif 130 #endif
132 return products; 131 return products;
133 } 132 }
134 133
135 G4DecayProducts* G4PhaseSpaceDecayChannel::Two << 134 G4DecayProducts *G4PhaseSpaceDecayChannel::TwoBodyDecayIt()
136 { 135 {
137 #ifdef G4VERBOSE 136 #ifdef G4VERBOSE
138 if (GetVerboseLevel() > 1) G4cout << "G4Phas << 137 if (GetVerboseLevel()>1) G4cout << "G4PhaseSpaceDecayChannel::TwoBodyDecayIt()"<<G4endl;
139 #endif 138 #endif
140 // parent mass 139 // parent mass
141 G4double parentmass = current_parent_mass.Ge << 140 G4double parentmass = parent_mass;
142 << 141
143 // daughters'mass, width << 142 //daughters'mass
144 G4double daughtermass[2], daughterwidth[2]; << 143 G4double daughtermass[2];
145 daughtermass[0] = G4MT_daughters_mass[0]; << 144 G4double daughtermomentum;
146 daughtermass[1] = G4MT_daughters_mass[1]; << 145 daughtermass[0] = daughters_mass[0];
147 daughterwidth[0] = G4MT_daughters_width[0]; << 146 daughtermass[1] = daughters_mass[1];
148 daughterwidth[1] = G4MT_daughters_width[1]; << 147 G4double sumofdaughtermass = daughtermass[0] + daughtermass[1];
149 148
150 // create parent G4DynamicParticle at rest << 149 //create parent G4DynamicParticle at rest
151 G4ThreeVector dummy; 150 G4ThreeVector dummy;
152 auto parentparticle = new G4DynamicParticle( << 151 G4DynamicParticle * parentparticle = new G4DynamicParticle( parent, dummy, 0.0);
153 // create G4Decayproducts << 152 //create G4Decayproducts
154 auto products = new G4DecayProducts(*parentp << 153 G4DecayProducts *products = new G4DecayProducts(*parentparticle);
155 delete parentparticle; 154 delete parentparticle;
156 155
157 if (!useGivenDaughterMass) { << 156 //calculate daughter momentum
158 G4bool withWidth = (daughterwidth[0] > 1.0 << 157 daughtermomentum = Pmx(parentmass,daughtermass[0],daughtermass[1]);
159 || (daughterwidth[1] > << 158 G4double costheta = 2.*G4UniformRand()-1.0;
160 if (withWidth) { << 159 G4double sintheta = sqrt((1.0 - costheta)*(1.0 + costheta));
161 G4double sumofdaughterwidthsq = << 160 G4double phi = 2.0*M_PI*G4UniformRand()*rad;
162 daughterwidth[0] * daughterwidth[0] + << 161 G4ThreeVector direction(sintheta*cos(phi),sintheta*sin(phi),costheta);
163 // check parent mass and daughter mass << 162
164 G4double maxDev = << 163 //create daughter G4DynamicParticle
165 (parentmass - daughtermass[0] - daught << 164 G4DynamicParticle * daughterparticle = new G4DynamicParticle( daughters[0], direction*daughtermomentum);
166 if (maxDev <= -1.0 * rangeMass) { <<
167 #ifdef G4VERBOSE <<
168 if (GetVerboseLevel() > 0) { <<
169 G4cout << "G4PhaseSpaceDecayChannel: <<
170 << "Sum of daughter mass is l <<
171 G4cout << "Parent :" << G4MT_parent- <<
172 << current_parent_mass.Get() <<
173 G4cout << "Daughter 1 :" << G4MT_dau <<
174 << daughtermass[0] / GeV << G <<
175 G4cout << "Daughter 2:" << G4MT_daug <<
176 << daughtermass[1] / GeV << G <<
177 } <<
178 #endif <<
179 G4Exception("G4PhaseSpaceDecayChannel: <<
180 "Cannot create decay produ <<
181 larger than parent mass!" <<
182 return products; <<
183 } <<
184 G4double dm1 = daughtermass[0]; <<
185 if (daughterwidth[0] > 0.) dm1 = Dynamic <<
186 G4double dm2 = daughtermass[1]; <<
187 if (daughterwidth[1] > 0.) dm2 = Dynamic <<
188 while (dm1 + dm2 > parentmass) // Loop <<
189 { <<
190 dm1 = DynamicalMass(daughtermass[0], d <<
191 dm2 = DynamicalMass(daughtermass[1], d <<
192 } <<
193 daughtermass[0] = dm1; <<
194 daughtermass[1] = dm2; <<
195 } <<
196 } <<
197 else { <<
198 // use given daughter mass; <<
199 daughtermass[0] = givenDaughterMasses[0]; <<
200 daughtermass[1] = givenDaughterMasses[1]; <<
201 } <<
202 if (parentmass < daughtermass[0] + daughterm <<
203 #ifdef G4VERBOSE <<
204 if (GetVerboseLevel() > 0) { <<
205 G4cout << "G4PhaseSpaceDecayChannel::Two <<
206 << "Sum of daughter mass is large <<
207 G4cout << "Parent :" << G4MT_parent->Get <<
208 << current_parent_mass.Get() / Ge <<
209 G4cout << "Daughter 1 :" << G4MT_daughte <<
210 << daughtermass[0] / GeV << G4end <<
211 G4cout << "Daughter 2:" << G4MT_daughter <<
212 << daughtermass[1] / GeV << G4end <<
213 if (useGivenDaughterMass) { <<
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); 165 products->PushProducts(daughterparticle);
238 Ekin = std::sqrt(daughtermomentum * daughter << 166 daughterparticle = new G4DynamicParticle( daughters[1], direction*(-1.0*daughtermomentum));
239 - daughtermass[1]; <<
240 daughterparticle = <<
241 new G4DynamicParticle(G4MT_daughters[1], - <<
242 products->PushProducts(daughterparticle); 167 products->PushProducts(daughterparticle);
243 168
244 #ifdef G4VERBOSE 169 #ifdef G4VERBOSE
245 if (GetVerboseLevel() > 1) { << 170 if (GetVerboseLevel()>1) {
246 G4cout << "G4PhaseSpaceDecayChannel::TwoBo << 171 G4cout << "G4PhaseSpaceDecayChannel::TwoBodyDecayIt ";
247 G4cout << " Create decay products in rest << 172 G4cout << " create decay products in rest frame " <<G4endl;
248 products->DumpInfo(); << 173 products->DumpInfo();
249 } 174 }
250 #endif 175 #endif
251 return products; 176 return products;
252 } 177 }
253 178
254 G4DecayProducts* G4PhaseSpaceDecayChannel::Thr << 179 G4DecayProducts *G4PhaseSpaceDecayChannel::ThreeBodyDecayIt()
>> 180 // algorism of this code is originally written in GDECA3 of GEANT3
255 { 181 {
256 // Algorithm of this code originally written <<
257 <<
258 #ifdef G4VERBOSE 182 #ifdef G4VERBOSE
259 if (GetVerboseLevel() > 1) G4cout << "G4Phas << 183 if (GetVerboseLevel()>1) G4cout << "G4PhaseSpaceDecayChannel::ThreeBodyDecayIt()"<<G4endl;
260 #endif 184 #endif
261 // parent mass 185 // parent mass
262 G4double parentmass = current_parent_mass.Ge << 186 G4double parentmass = parent_mass;
263 // daughters'mass << 187 //daughters'mass
264 G4double daughtermass[3], daughterwidth[3]; << 188 G4double daughtermass[3];
265 G4double sumofdaughtermass = 0.0; 189 G4double sumofdaughtermass = 0.0;
266 G4double sumofdaughterwidthsq = 0.0; << 190 for (G4int index=0; index<3; index++){
267 G4bool withWidth = false; << 191 daughtermass[index] = daughters_mass[index];
268 for (G4int index = 0; index < 3; ++index) { <<
269 daughtermass[index] = G4MT_daughters_mass[ <<
270 sumofdaughtermass += daughtermass[index]; 192 sumofdaughtermass += daughtermass[index];
271 daughterwidth[index] = G4MT_daughters_widt <<
272 sumofdaughterwidthsq += daughterwidth[inde <<
273 withWidth = withWidth || (daughterwidth[in <<
274 } 193 }
275 << 194
276 // create parent G4DynamicParticle at rest << 195 //create parent G4DynamicParticle at rest
277 G4ThreeVector dummy; 196 G4ThreeVector dummy;
278 auto parentparticle = new G4DynamicParticle( << 197 G4DynamicParticle * parentparticle = new G4DynamicParticle( parent, dummy, 0.0);
279 << 198 //create G4Decayproducts
280 // create G4Decayproducts << 199 G4DecayProducts *products = new G4DecayProducts(*parentparticle);
281 auto products = new G4DecayProducts(*parentp <<
282 delete parentparticle; 200 delete parentparticle;
283 201
284 if (!useGivenDaughterMass) { << 202 //calculate daughter momentum
285 if (withWidth) { << 203 // Generate two
286 G4double maxDev = (parentmass - sumofdau <<
287 if (maxDev <= -1.0 * rangeMass) { <<
288 #ifdef G4VERBOSE <<
289 if (GetVerboseLevel() > 0) { <<
290 G4cout << "G4PhaseSpaceDecayChannel: <<
291 << "Sum of daughter mass is l <<
292 G4cout << "Parent :" << G4MT_parent- <<
293 << current_parent_mass.Get() <<
294 G4cout << "Daughter 1 :" << G4MT_dau <<
295 << daughtermass[0] / GeV << G <<
296 G4cout << "Daughter 2:" << G4MT_daug <<
297 << daughtermass[1] / GeV << G <<
298 G4cout << "Daughter 3:" << G4MT_daug <<
299 << daughtermass[2] / GeV << G <<
300 } <<
301 #endif <<
302 G4Exception("G4PhaseSpaceDecayChannel: <<
303 "Cannot create decay produ <<
304 is larger than parent mas <<
305 return products; <<
306 } <<
307 G4double dm1 = daughtermass[0]; <<
308 if (daughterwidth[0] > 0.) dm1 = Dynamic <<
309 G4double dm2 = daughtermass[1]; <<
310 if (daughterwidth[1] > 0.) dm2 = Dynamic <<
311 G4double dm3 = daughtermass[2]; <<
312 if (daughterwidth[2] > 0.) dm3 = Dynamic <<
313 while (dm1 + dm2 + dm3 > parentmass) // <<
314 { <<
315 dm1 = DynamicalMass(daughtermass[0], d <<
316 dm2 = DynamicalMass(daughtermass[1], d <<
317 dm3 = DynamicalMass(daughtermass[2], d <<
318 } <<
319 daughtermass[0] = dm1; <<
320 daughtermass[1] = dm2; <<
321 daughtermass[2] = dm3; <<
322 sumofdaughtermass = dm1 + dm2 + dm3; <<
323 } <<
324 } <<
325 else { <<
326 // use given daughter mass; <<
327 daughtermass[0] = givenDaughterMasses[0]; <<
328 daughtermass[1] = givenDaughterMasses[1]; <<
329 daughtermass[2] = givenDaughterMasses[2]; <<
330 sumofdaughtermass = daughtermass[0] + daug <<
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 } <<
356 <<
357 // calculate daughter momentum <<
358 // Generate two <<
359 G4double rd1, rd2, rd; 204 G4double rd1, rd2, rd;
360 G4double daughtermomentum[3]; 205 G4double daughtermomentum[3];
361 G4double momentummax = 0.0, momentumsum = 0. << 206 G4double momentummax=0.0, momentumsum = 0.0;
362 G4double energy; 207 G4double energy;
363 const std::size_t MAX_LOOP = 10000; <<
364 208
365 for (std::size_t loop_counter = 0; loop_coun << 209 do {
366 rd1 = G4UniformRand(); 210 rd1 = G4UniformRand();
367 rd2 = G4UniformRand(); 211 rd2 = G4UniformRand();
368 if (rd2 > rd1) { 212 if (rd2 > rd1) {
369 rd = rd1; << 213 rd = rd1;
370 rd1 = rd2; 214 rd1 = rd2;
371 rd2 = rd; 215 rd2 = rd;
372 } << 216 }
373 momentummax = 0.0; 217 momentummax = 0.0;
374 momentumsum = 0.0; 218 momentumsum = 0.0;
375 // daughter 0 219 // daughter 0
376 energy = rd2 * (parentmass - sumofdaughter << 220 energy = rd2*(parentmass - sumofdaughtermass);
377 daughtermomentum[0] = std::sqrt(energy * e << 221 daughtermomentum[0] = sqrt(energy*energy + 2.0*energy* daughtermass[0]);
378 if (daughtermomentum[0] > momentummax) mom << 222 if ( daughtermomentum[0] >momentummax )momentummax = daughtermomentum[0];
379 momentumsum += daughtermomentum[0]; << 223 momentumsum += daughtermomentum[0];
380 // daughter 1 224 // daughter 1
381 energy = (1. - rd1) * (parentmass - sumofd << 225 energy = (1.-rd1)*(parentmass - sumofdaughtermass);
382 daughtermomentum[1] = std::sqrt(energy * e << 226 daughtermomentum[1] = sqrt(energy*energy + 2.0*energy* daughtermass[1]);
383 if (daughtermomentum[1] > momentummax) mom << 227 if ( daughtermomentum[1] >momentummax )momentummax = daughtermomentum[1];
384 momentumsum += daughtermomentum[1]; << 228 momentumsum += daughtermomentum[1];
385 // daughter 2 229 // daughter 2
386 energy = (rd1 - rd2) * (parentmass - sumof << 230 energy = (rd1-rd2)*(parentmass - sumofdaughtermass);
387 daughtermomentum[2] = std::sqrt(energy * e << 231 daughtermomentum[2] = sqrt(energy*energy + 2.0*energy* daughtermass[2]);
388 if (daughtermomentum[2] > momentummax) mom << 232 if ( daughtermomentum[2] >momentummax )momentummax = daughtermomentum[2];
389 momentumsum += daughtermomentum[2]; << 233 momentumsum += daughtermomentum[2];
390 if (momentummax <= momentumsum - momentumm << 234 } while (momentummax > momentumsum - momentummax );
391 } <<
392 <<
393 // output message 235 // output message
394 #ifdef G4VERBOSE 236 #ifdef G4VERBOSE
395 if (GetVerboseLevel() > 1) { << 237 if (GetVerboseLevel()>1) {
396 G4cout << " daughter 0:" << daughtermo << 238 G4cout << " daughter 0:" << daughtermomentum[0]/GeV << "[GeV/c]" <<G4endl;
397 G4cout << " daughter 1:" << daughtermo << 239 G4cout << " daughter 1:" << daughtermomentum[1]/GeV << "[GeV/c]" <<G4endl;
398 G4cout << " daughter 2:" << daughtermo << 240 G4cout << " daughter 2:" << daughtermomentum[2]/GeV << "[GeV/c]" <<G4endl;
399 G4cout << " momentum sum:" << momentumsu << 241 G4cout << " momentum sum:" << momentumsum/GeV << "[GeV/c]" <<G4endl;
400 } 242 }
401 #endif 243 #endif
402 244
403 // create daughter G4DynamicParticle << 245 //create daughter G4DynamicParticle
404 G4double costheta, sintheta, phi, sinphi, co << 246 G4double costheta, sintheta, phi, sinphi, cosphi;
405 G4double costhetan, sinthetan, phin, sinphin << 247 G4double costhetan, sinthetan, phin, sinphin, cosphin;
406 costheta = 2. * G4UniformRand() - 1.0; << 248 costheta = 2.*G4UniformRand()-1.0;
407 sintheta = std::sqrt((1.0 - costheta) * (1.0 << 249 sintheta = sqrt((1.0-costheta)*(1.0+costheta));
408 phi = twopi * G4UniformRand() * rad; << 250 phi = 2.0*M_PI*G4UniformRand()*rad;
409 sinphi = std::sin(phi); << 251 sinphi = sin(phi);
410 cosphi = std::cos(phi); << 252 cosphi = cos(phi);
411 << 253 G4ThreeVector direction0(sintheta*cosphi,sintheta*sinphi,costheta);
412 G4ThreeVector direction0(sintheta * cosphi, << 254 G4DynamicParticle * daughterparticle
413 G4double Ekin = << 255 = new G4DynamicParticle( daughters[0], direction0*daughtermomentum[0]);
414 std::sqrt(daughtermomentum[0] * daughtermo <<
415 - daughtermass[0]; <<
416 auto daughterparticle = <<
417 new G4DynamicParticle(G4MT_daughters[0], d <<
418 products->PushProducts(daughterparticle); 256 products->PushProducts(daughterparticle);
419 257
420 costhetan = (daughtermomentum[1] * daughterm << 258 costhetan = (daughtermomentum[1]*daughtermomentum[1]-daughtermomentum[2]*daughtermomentum[2]-daughtermomentum[0]*daughtermomentum[0])/(2.0*daughtermomentum[2]*daughtermomentum[0]);
421 - daughtermomentum[0] * daughte << 259 sinthetan = sqrt((1.0-costhetan)*(1.0+costhetan));
422 / (2.0 * daughtermomentum[2] * d << 260 phin = 2.0*M_PI*G4UniformRand()*rad;
423 sinthetan = std::sqrt((1.0 - costhetan) * (1 << 261 sinphin = sin(phin);
424 phin = twopi * G4UniformRand() * rad; << 262 cosphin = cos(phin);
425 sinphin = std::sin(phin); <<
426 cosphin = std::cos(phin); <<
427 G4ThreeVector direction2; 263 G4ThreeVector direction2;
428 direction2.setX(sinthetan * cosphin * costhe << 264 direction2.setX( sinthetan*cosphin*costheta*cosphi - sinthetan*sinphin*sinphi + costhetan*sintheta*cosphi);
429 + costhetan * sintheta * cos << 265 direction2.setY( sinthetan*cosphin*costheta*sinphi + sinthetan*sinphin*cosphi + costhetan*sintheta*sinphi);
430 direction2.setY(sinthetan * cosphin * costhe << 266 direction2.setZ( -sinthetan*cosphin*sintheta + costhetan*costheta);
431 + costhetan * sintheta * sin << 267 daughterparticle = new G4DynamicParticle( daughters[2], direction2*(daughtermomentum[2]/direction2.mag()));
432 direction2.setZ(-sinthetan * cosphin * sinth <<
433 G4ThreeVector pmom = daughtermomentum[2] * d <<
434 Ekin = std::sqrt(pmom.mag2() + daughtermass[ <<
435 daughterparticle = <<
436 new G4DynamicParticle(G4MT_daughters[2], p <<
437 products->PushProducts(daughterparticle); 268 products->PushProducts(daughterparticle);
438 269
439 pmom = (direction0 * daughtermomentum[0] + d << 270 daughterparticle =
440 * (-1.0); << 271 new G4DynamicParticle(
441 Ekin = std::sqrt(pmom.mag2() + daughtermass[ << 272 daughters[1],
442 daughterparticle = << 273 (direction0*daughtermomentum[0] + direction2*(daughtermomentum[2]/direction2.mag()))*(-1.0)
443 new G4DynamicParticle(G4MT_daughters[1], p << 274 );
444 products->PushProducts(daughterparticle); 275 products->PushProducts(daughterparticle);
445 276
446 #ifdef G4VERBOSE 277 #ifdef G4VERBOSE
447 if (GetVerboseLevel() > 1) { << 278 if (GetVerboseLevel()>1) {
448 G4cout << "G4PhaseSpaceDecayChannel::Three << 279 G4cout << "G4PhaseSpaceDecayChannel::ThreeBodyDecayIt ";
449 G4cout << " create decay products in rest << 280 G4cout << " create decay products in rest frame " <<G4endl;
450 products->DumpInfo(); << 281 products->DumpInfo();
451 } 282 }
452 #endif 283 #endif
453 return products; 284 return products;
454 } 285 }
455 286
456 G4DecayProducts* G4PhaseSpaceDecayChannel::Man << 287 G4DecayProducts *G4PhaseSpaceDecayChannel::ManyBodyDecayIt()
>> 288 // algorithm of this code is originally written in FORTRAN by M.Asai
>> 289 //******************************************************************
>> 290 // NBODY
>> 291 // N-body phase space Monte-Carlo generator
>> 292 // Makoto Asai
>> 293 // Hiroshima Institute of Technology
>> 294 // (asai@kekvax.kek.jp)
>> 295 // Revised release : 19/Apr/1995
>> 296 //
457 { 297 {
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; 298 G4int index, index2;
465 299
>> 300 //return value
>> 301 G4DecayProducts *products;
>> 302
466 #ifdef G4VERBOSE 303 #ifdef G4VERBOSE
467 if (GetVerboseLevel() > 1) G4cout << "G4Phas << 304 if (GetVerboseLevel()>1) G4cout << "G4PhaseSpaceDecayChannel::ManyBodyDecayIt()"<<G4endl;
468 #endif 305 #endif
469 <<
470 // parent mass 306 // parent mass
471 G4double parentmass = current_parent_mass.Ge << 307 G4double parentmass = parent_mass;
472 << 308 //daughters'mass
473 // parent particle << 309 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; 310 G4double sumofdaughtermass = 0.0;
485 for (index = 0; index < numberOfDaughters; + << 311 for (index=0; index<numberOfDaughters; index++){
486 if (!useGivenDaughterMass) { << 312 daughtermass[index] = daughters_mass[index];
487 daughtermass[index] = G4MT_daughters_mas <<
488 } <<
489 else { <<
490 daughtermass[index] = givenDaughterMasse <<
491 } <<
492 sumofdaughtermass += daughtermass[index]; 313 sumofdaughtermass += daughtermass[index];
493 } 314 }
494 if (sumofdaughtermass > parentmass) { << 315
495 #ifdef G4VERBOSE << 316 //Calculate daughter momentum
496 if (GetVerboseLevel() > 0) { << 317 G4double *daughtermomentum = new G4double[numberOfDaughters];
497 G4cout << "G4PhaseSpaceDecayChannel::Man << 318 G4ThreeVector direction;
498 << "Sum of daughter mass is large << 319 G4DynamicParticle **daughterparticle;
499 G4cout << "Parent :" << G4MT_parent->Get << 320 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; 321 G4double tmas;
526 G4double weight = 1.0; 322 G4double weight = 1.0;
527 G4int numberOfTry = 0; << 323 G4int numberOfTry = 0;
528 const std::size_t MAX_LOOP = 10000; << 324
529 << 325 do {
530 for (std::size_t loop_counter = 0; loop_coun << 326 //Generate rundom number in descending order
531 // Generate rundom number in descending or <<
532 G4double temp; 327 G4double temp;
533 auto rd = new G4double[numberOfDaughters]; << 328 G4double *rd = new G4double[numberOfDaughters];
534 rd[0] = 1.0; 329 rd[0] = 1.0;
535 for (index = 1; index < numberOfDaughters << 330 for(index =1; index < numberOfDaughters -1; index++) rd[index] = G4UniformRand();
536 rd[index] = G4UniformRand(); << 331 rd[ numberOfDaughters -1] = 0.0;
537 } << 332 for(index =1; index < numberOfDaughters -1; index++) {
538 rd[numberOfDaughters - 1] = 0.0; << 333 for(index2 = index+1; index2 < numberOfDaughters; index2++) {
539 for (index = 1; index < numberOfDaughters << 334 if (rd[index] < rd[index2]){
540 for (index2 = index + 1; index2 < number << 335 temp = rd[index];
541 if (rd[index] < rd[index2]) { << 336 rd[index] = rd[index2];
542 temp = rd[index]; <<
543 rd[index] = rd[index2]; <<
544 rd[index2] = temp; 337 rd[index2] = temp;
545 } 338 }
546 } 339 }
547 } 340 }
548 << 341
549 // calculate virtual mass << 342 //calcurate virtual mass
550 tmas = parentmass - sumofdaughtermass; << 343 tmas = parentmass - sumofdaughtermass;
551 temp = sumofdaughtermass; << 344 temp = sumofdaughtermass;
552 for (index = 0; index < numberOfDaughters; << 345 for(index =0; index < numberOfDaughters; index++) {
553 sm[index] = rd[index] * tmas + temp; << 346 sm[index] = rd[index]*tmas + temp;
554 temp -= daughtermass[index]; 347 temp -= daughtermass[index];
555 if (GetVerboseLevel() > 1) { << 348 if (GetVerboseLevel()>1) {
556 G4cout << index << " rundom number:" << 349 G4cout << index << " rundom number:" << rd[index];
557 G4cout << " virtual mass:" << sm[ind << 350 G4cout << " virtual mass:" << sm[index]/GeV << "[GeV/c/c]" <<G4endl;
558 } 351 }
559 } 352 }
560 delete[] rd; << 353 delete [] rd;
561 354
562 // Calculate daughter momentum << 355 //Calculate daughter momentum
563 weight = 1.0; 356 weight = 1.0;
564 G4bool smOK = true; << 357 index =numberOfDaughters-1;
565 for (index = 0; index < numberOfDaughters << 358 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 359 #ifdef G4VERBOSE
573 if (GetVerboseLevel() > 1) { << 360 if (GetVerboseLevel()>1) {
574 G4cout << " daughter " << index << " 361 G4cout << " daughter " << index << ":" << *daughters_name[index];
575 G4cout << " momentum:" << daughtermoment << 362 G4cout << " momentum:" << daughtermomentum[index]/GeV << "[GeV/c]" <<G4endl;
576 } 363 }
577 #endif 364 #endif
578 for (index = numberOfDaughters - 2; index << 365 for(index =numberOfDaughters-2; index>=0; index--) {
579 // calculate << 366 // calculate
580 daughtermomentum[index] = Pmx(sm[index], << 367 daughtermomentum[index]= Pmx( sm[index],daughtermass[index], sm[index +1]);
581 if (daughtermomentum[index] < 0.0) { << 368 if(daughtermomentum[index] < 0.0) {
582 // !!! illegal momentum !!! 369 // !!! illegal momentum !!!
583 #ifdef G4VERBOSE 370 #ifdef G4VERBOSE
584 if (GetVerboseLevel() > 0) { << 371 if (GetVerboseLevel()>0) {
585 G4cout << "G4PhaseSpaceDecayChannel: << 372 G4cout << "G4PhaseSpaceDecayChannel::ManyBodyDecayIt ";
586 G4cout << " Cannot calculate dau << 373 G4cout << " can not calculate daughter momentum " <<G4endl;
587 G4cout << " parent:" << *parent_ 374 G4cout << " parent:" << *parent_name;
588 G4cout << " mass:" << parentmass / G << 375 G4cout << " mass:" << parentmass/GeV << "[GeV/c/c]" <<G4endl;
589 G4cout << " daughter " << index 376 G4cout << " daughter " << index << ":" << *daughters_name[index];
590 G4cout << " mass:" << daughtermass[i << 377 G4cout << " mass:" << daughtermass[index]/GeV << "[GeV/c/c]" ;
591 G4cout << " mass:" << daughtermoment << 378 G4cout << " mass:" << daughtermomentum[index]/GeV << "[GeV/c]" <<G4endl;
592 if (useGivenDaughterMass) { <<
593 G4cout << "Daughter Mass is given. <<
594 } <<
595 } 379 }
596 #endif 380 #endif
597 delete[] sm; << 381 delete [] sm;
598 delete[] daughtermass; << 382 delete [] daughtermass;
599 delete[] daughtermomentum; << 383 delete [] daughtermomentum;
600 delete products; << 384 return 0; // Error detection
601 G4Exception("G4PhaseSpaceDecayChannel: << 385
602 "Can not create decay prod << 386 } else {
603 is larger than parent mas << 387 // calculate weight of this events
604 return nullptr; // Error detection << 388 weight *= daughtermomentum[index]/sm[index];
605 } << 389 if (GetVerboseLevel()>1) {
606 << 390 G4cout << " daughter " << index << ":" << *daughters_name[index];
607 // calculate weight of this events << 391 G4cout << " momentum:" << daughtermomentum[index]/GeV << "[GeV/c]" <<G4endl;
608 weight *= daughtermomentum[index] / sm[i << 392 }
609 #ifdef G4VERBOSE <<
610 if (GetVerboseLevel() > 1) { <<
611 G4cout << " daughter " << index << <<
612 G4cout << " momentum:" << daughtermome <<
613 } 393 }
614 #endif <<
615 } 394 }
616 << 395 if (GetVerboseLevel()>1) {
617 #ifdef G4VERBOSE << 396 G4cout << " weight: " << weight <<G4endl;
618 if (GetVerboseLevel() > 1) { <<
619 G4cout << " weight: " << weight << G4 <<
620 } 397 }
621 #endif << 398
622 <<
623 // exit if number of Try exceeds 100 399 // exit if number of Try exceeds 100
624 if (++numberOfTry > 100) { << 400 if (numberOfTry++ >100) {
625 #ifdef G4VERBOSE << 401 if (GetVerboseLevel()>0) {
626 if (GetVerboseLevel() > 0) { << 402 G4cout << "G4PhaseSpaceDecayChannel::ManyBodyDecayIt: ";
627 G4cout << "G4PhaseSpaceDecayChannel::M << 403 G4cout << " can not determine Decay Kinematics " << G4endl;
628 G4cout << "Cannot determine Decay Kine <<
629 G4cout << "parent : " << *parent_name <<
630 G4cout << "daughters : "; <<
631 for (index = 0; index < numberOfDaught <<
632 G4cout << *daughters_name[index] << <<
633 } <<
634 G4cout << G4endl; <<
635 } 404 }
636 #endif << 405 delete [] sm;
637 G4Exception("G4PhaseSpaceDecayChannel::M << 406 delete [] daughtermass;
638 "Cannot decay: Decay Kinemat << 407 delete [] daughtermomentum;
639 << 408 return 0; // Error detection
640 delete[] sm; <<
641 delete[] daughtermass; <<
642 delete[] daughtermomentum; <<
643 delete products; <<
644 return nullptr; // Error detection <<
645 } 409 }
646 if (weight < G4UniformRand()) break; << 410 } while ( weight > G4UniformRand());
647 } <<
648 411
649 #ifdef G4VERBOSE 412 #ifdef G4VERBOSE
650 if (GetVerboseLevel() > 1) { << 413 if (GetVerboseLevel()>1) {
651 G4cout << "Start calculation of daughters << 414 G4cout << "Start calulation of daughters momentum vector "<<G4endl;
652 } 415 }
653 #endif << 416 #endif
654 <<
655 G4double costheta, sintheta, phi; 417 G4double costheta, sintheta, phi;
656 G4double beta; 418 G4double beta;
657 daughterparticle = new G4DynamicParticle*[nu 419 daughterparticle = new G4DynamicParticle*[numberOfDaughters];
658 420
659 index = numberOfDaughters - 2; << 421 index = numberOfDaughters -2;
660 costheta = 2. * G4UniformRand() - 1.0; << 422 costheta = 2.*G4UniformRand()-1.0;
661 sintheta = std::sqrt((1.0 - costheta) * (1.0 << 423 sintheta = sqrt((1.0-costheta)*(1.0+costheta));
662 phi = twopi * G4UniformRand() * rad; << 424 phi = 2.0*M_PI*G4UniformRand()*rad;
663 direction.setZ(costheta); 425 direction.setZ(costheta);
664 direction.setY(sintheta * std::sin(phi)); << 426 direction.setY(sintheta*sin(phi));
665 direction.setX(sintheta * std::cos(phi)); << 427 direction.setX(sintheta*cos(phi));
666 daughterparticle[index] = << 428 daughterparticle[index] = new G4DynamicParticle( daughters[index], direction*daughtermomentum[index] );
667 new G4DynamicParticle(G4MT_daughters[index << 429 daughterparticle[index+1] = new G4DynamicParticle( daughters[index+1], direction*(-1.0*daughtermomentum[index]) );
668 daughterparticle[index + 1] = << 430
669 new G4DynamicParticle(G4MT_daughters[index << 431 for (index = numberOfDaughters -3; index >= 0; index--) {
670 << 432 //calculate momentum direction
671 for (index = numberOfDaughters - 3; index >= << 433 costheta = 2.*G4UniformRand()-1.0;
672 // calculate momentum direction << 434 sintheta = sqrt((1.0-costheta)*(1.0+costheta));
673 costheta = 2. * G4UniformRand() - 1.0; << 435 phi = 2.0*M_PI*G4UniformRand()*rad;
674 sintheta = std::sqrt((1.0 - costheta) * (1 <<
675 phi = twopi * G4UniformRand() * rad; <<
676 direction.setZ(costheta); 436 direction.setZ(costheta);
677 direction.setY(sintheta * std::sin(phi)); << 437 direction.setY(sintheta*sin(phi));
678 direction.setX(sintheta * std::cos(phi)); << 438 direction.setX(sintheta*cos(phi));
679 439
680 // boost already created particles << 440 // boost already created particles
681 beta = daughtermomentum[index]; 441 beta = daughtermomentum[index];
682 beta /= << 442 beta /= sqrt( daughtermomentum[index]*daughtermomentum[index] + sm[index+1]*sm[index+1] );
683 std::sqrt(daughtermomentum[index] * daug << 443 for (G4int index2 = index+1; index2<numberOfDaughters; index2++) {
684 for (index2 = index + 1; index2 < numberOf <<
685 G4LorentzVector p4; 444 G4LorentzVector p4;
686 // make G4LorentzVector for secondaries 445 // make G4LorentzVector for secondaries
687 p4 = daughterparticle[index2]->Get4Momen 446 p4 = daughterparticle[index2]->Get4Momentum();
688 447
689 // boost secondaries to new frame << 448 // boost secondaries to new frame
690 p4.boost(direction.x() * beta, direction << 449 p4.boost( direction.x()*beta, direction.y()*beta, direction.z()*beta);
691 450
692 // change energy/momentum 451 // change energy/momentum
693 daughterparticle[index2]->Set4Momentum(p 452 daughterparticle[index2]->Set4Momentum(p4);
694 } 453 }
695 // create daughter G4DynamicParticle << 454 //create daughter G4DynamicParticle
696 daughterparticle[index] = << 455 daughterparticle[index]= new G4DynamicParticle( daughters[index], direction*(-1.0*daughtermomentum[index]));
697 new G4DynamicParticle(G4MT_daughters[ind <<
698 } 456 }
699 457
700 // add daughters to G4Decayproducts << 458 //create G4Decayproducts
701 for (index = 0; index < numberOfDaughters; + << 459 G4DynamicParticle *parentparticle;
>> 460 direction.setX(1.0); direction.setY(0.0); direction.setZ(0.0);
>> 461 parentparticle = new G4DynamicParticle( parent, direction, 0.0);
>> 462 products = new G4DecayProducts(*parentparticle);
>> 463 delete parentparticle;
>> 464 for (index = 0; index<numberOfDaughters; index++) {
702 products->PushProducts(daughterparticle[in 465 products->PushProducts(daughterparticle[index]);
703 } 466 }
704 <<
705 #ifdef G4VERBOSE 467 #ifdef G4VERBOSE
706 if (GetVerboseLevel() > 1) { << 468 if (GetVerboseLevel()>1) {
707 G4cout << "G4PhaseSpaceDecayChannel::ManyB << 469 G4cout << "G4PhaseSpaceDecayChannel::ManyBodyDecayIt ";
708 G4cout << " create decay products in rest << 470 G4cout << " create decay products in rest frame " << G4endl;
709 products->DumpInfo(); 471 products->DumpInfo();
710 } 472 }
711 #endif 473 #endif
712 << 474 delete [] daughterparticle;
713 delete[] daughterparticle; << 475 delete [] daughtermomentum;
714 delete[] daughtermomentum; << 476 delete [] daughtermass;
715 delete[] daughtermass; << 477 delete [] sm;
716 delete[] sm; << 478
717 <<
718 return products; 479 return products;
719 } 480 }
720 481
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 } <<
729 482
730 G4bool G4PhaseSpaceDecayChannel::SampleDaughte <<
731 { <<
732 useGivenDaughterMass = false; <<
733 return useGivenDaughterMass; <<
734 } <<
735 483
736 G4bool G4PhaseSpaceDecayChannel::IsOKWithParen <<
737 { <<
738 if (!useGivenDaughterMass) return G4VDecayCh <<
739 <<
740 CheckAndFillParent(); <<
741 CheckAndFillDaughters(); <<
742 484
743 G4double sumOfDaughterMassMin = 0.0; <<
744 for (G4int index = 0; index < numberOfDaught <<
745 sumOfDaughterMassMin += givenDaughterMasse <<
746 } <<
747 return (parentMass >= sumOfDaughterMassMin); <<
748 } <<
749 485
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 } <<
757 486