| Geant4 Cross Reference |
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25 // 25 //
26 #include "G4Absorber.hh" 26 #include "G4Absorber.hh"
27 #include "G4KineticTrack.hh" 27 #include "G4KineticTrack.hh"
28 #include "G4PionPlus.hh" 28 #include "G4PionPlus.hh"
29 #include "G4PionMinus.hh" 29 #include "G4PionMinus.hh"
30 #include "G4PionZero.hh" 30 #include "G4PionZero.hh"
31 #include "G4Proton.hh" 31 #include "G4Proton.hh"
32 #include "G4Neutron.hh" 32 #include "G4Neutron.hh"
33 33
34 #include "G4PhysicalConstants.hh" <<
35 #include "G4SystemOfUnits.hh" <<
36 #include "G4LorentzRotation.hh" 34 #include "G4LorentzRotation.hh"
37 35
38 G4Absorber::G4Absorber(G4double cutOnP) 36 G4Absorber::G4Absorber(G4double cutOnP)
39 { 37 {
40 theCutOnP = cutOnP; 38 theCutOnP = cutOnP;
41 theAbsorbers = new G4KineticTrackVector; 39 theAbsorbers = new G4KineticTrackVector;
42 theProducts = new G4KineticTrackVector; 40 theProducts = new G4KineticTrackVector;
43 } 41 }
44 42
45 43
46 G4Absorber::~G4Absorber() 44 G4Absorber::~G4Absorber()
47 { 45 {
48 delete theAbsorbers; 46 delete theAbsorbers;
49 delete theProducts; 47 delete theProducts;
50 } 48 }
51 49
52 50
53 bool G4Absorber::WillBeAbsorbed(const G4Kineti 51 bool G4Absorber::WillBeAbsorbed(const G4KineticTrack & kt)
54 { 52 {
55 // FixMe: actually only for pions 53 // FixMe: actually only for pions
56 // if(kt.Get4Momentum().vect().mag() < theCut 54 // if(kt.Get4Momentum().vect().mag() < theCutOnP)
57 // Cut on kinetic Energy... 55 // Cut on kinetic Energy...
58 if (kt.Get4Momentum().e() - kt.GetActualMass 56 if (kt.Get4Momentum().e() - kt.GetActualMass() < theCutOnP)
59 { 57 {
60 if(kt.GetDefinition() == G4PionPlus::Pio 58 if(kt.GetDefinition() == G4PionPlus::PionPlus() ||
61 kt.GetDefinition() == G4PionZero::PionZero( 59 kt.GetDefinition() == G4PionZero::PionZero() ||
62 kt.GetDefinition() == G4PionMinus::PionMinu 60 kt.GetDefinition() == G4PionMinus::PionMinus())
63 { 61 {
64 return true; 62 return true;
65 } 63 }
66 } 64 }
67 return false; 65 return false;
68 } 66 }
69 67
70 68
71 69
72 G4bool G4Absorber::Absorb(G4KineticTrack & kt, 70 G4bool G4Absorber::Absorb(G4KineticTrack & kt, G4KineticTrackVector & tgt)
73 { 71 {
74 if(!FindAbsorbers(kt, tgt)) 72 if(!FindAbsorbers(kt, tgt))
75 return false; 73 return false;
76 return FindProducts(kt); 74 return FindProducts(kt);
77 } 75 }
78 76
79 77
80 G4bool G4Absorber::FindAbsorbers(G4KineticTrac 78 G4bool G4Absorber::FindAbsorbers(G4KineticTrack & kt,
81 G4KineticTrackVector & tgt) 79 G4KineticTrackVector & tgt)
82 { 80 {
83 // Find a closest ( in space) pair of Nucleon <<
84 // pi+ can be absorbed on np or nn resultin <<
85 // pi- can be absorbed on np or pp resultin <<
86 <<
87 // @GF: FindAbsorbers is unused, logic is seri <<
88 <<
89 G4KineticTrack * kt1 = NULL; 81 G4KineticTrack * kt1 = NULL;
90 G4KineticTrack * kt2 = NULL; 82 G4KineticTrack * kt2 = NULL;
91 G4double dist1 = DBL_MAX; // dist to close << 83 G4double dist1 = DBL_MAX;
92 G4double dist2 = DBL_MAX; // dist to next << 84 G4double dist2 = DBL_MAX;
93 G4double charge1 = 0; 85 G4double charge1 = 0;
94 // G4double charge2 = 0; // charge2 is only << 86 G4double charge2 = 0;
95 G4double charge0 = kt.GetDefinition()->GetPD 87 G4double charge0 = kt.GetDefinition()->GetPDGCharge();
96 G4ThreeVector pos = kt.GetPosition(); 88 G4ThreeVector pos = kt.GetPosition();
97 89
98 std::vector<G4KineticTrack *>::iterator iter 90 std::vector<G4KineticTrack *>::iterator iter;
99 for(iter = tgt.begin(); iter != tgt.end(); + 91 for(iter = tgt.begin(); iter != tgt.end(); ++iter)
100 { 92 {
101 G4KineticTrack * curr = *iter; 93 G4KineticTrack * curr = *iter;
102 G4double dist = (pos-curr->GetPosition()). 94 G4double dist = (pos-curr->GetPosition()).mag();
103 if(dist >= dist2) 95 if(dist >= dist2)
104 continue; 96 continue;
105 if(dist < dist1) 97 if(dist < dist1)
106 { 98 {
107 if(dist1 == DBL_MAX) // accept 1st as a << 99 if(dist1 == DBL_MAX) // accept the candidate
108 { 100 {
109 kt1 = curr; 101 kt1 = curr;
110 charge1 = kt1->GetDefinition()->GetPDGCharge 102 charge1 = kt1->GetDefinition()->GetPDGCharge();
111 dist1 = dist; 103 dist1 = dist;
112 continue; 104 continue;
113 } 105 }
114 if(dist2 == DBL_MAX) // accept the candi << 106 if(dist2 == DBL_MAX) // accept the candidate put kt1 in kt2
115 { // @GF: should'nt we check if co << 107 {
116 kt2 = kt1; 108 kt2 = kt1;
117 // charge2 = charge1; << 109 charge2 = charge1;
118 dist2 = dist1; 110 dist2 = dist1;
119 kt1 = curr; 111 kt1 = curr;
120 charge1 = kt1->GetDefinition()->GetPDGCharge 112 charge1 = kt1->GetDefinition()->GetPDGCharge();
121 dist1 = dist; 113 dist1 = dist;
122 continue; 114 continue;
123 } 115 }
124 // test the compatibility with charge conserva << 116 // test the compatibility with charge conservation
125 G4double charge = curr->GetDefinition()- 117 G4double charge = curr->GetDefinition()->GetPDGCharge();
126 if((charge0+charge1+charge < 0.) || //te << 118 if((charge0+charge1+charge < 0.) ||
127 (charge0+charge1+charge) > 2*eplus) 119 (charge0+charge1+charge) > 2*eplus)
128 { // incompatible: change kt1 with curr << 120 { // incomatible: change kt1 with curr.
129 kt1 = curr; 121 kt1 = curr;
130 charge1 = charge; 122 charge1 = charge;
131 dist1 = dist; 123 dist1 = dist;
132 } 124 }
133 else 125 else
134 { // compatible: change kt1 with curr an 126 { // compatible: change kt1 with curr and kt2 with kt1
135 kt2 = kt1; 127 kt2 = kt1;
136 // charge2 = charge1; << 128 charge2 = charge1;
137 dist2 = dist1; 129 dist2 = dist1;
138 kt1 = curr; 130 kt1 = curr;
139 charge1 = charge; 131 charge1 = charge;
140 dist1 = dist; 132 dist1 = dist;
141 } 133 }
142 continue; 134 continue;
143 } 135 }
144 // here if dist1 < dist < dist2 136 // here if dist1 < dist < dist2
145 if(dist2 == DBL_MAX) // accept the candida 137 if(dist2 == DBL_MAX) // accept the candidate
146 { 138 {
147 kt2 = curr; 139 kt2 = curr;
148 // charge2 = kt2->GetDefinition()->GetPDG << 140 charge2 = kt2->GetDefinition()->GetPDGCharge();
149 dist2 = dist; 141 dist2 = dist;
150 continue; 142 continue;
151 } 143 }
152 // test the compatibility with charge conserva 144 // test the compatibility with charge conservation
153 G4double charge = curr->GetDefinition()->G 145 G4double charge = curr->GetDefinition()->GetPDGCharge();
154 if((charge0+charge1+charge < 0.) || 146 if((charge0+charge1+charge < 0.) ||
155 (charge0+charge1+charge) > 2*eplus) 147 (charge0+charge1+charge) > 2*eplus)
156 continue; // incomatible: do nothing 148 continue; // incomatible: do nothing
157 // compatible: change kt2 with curr 149 // compatible: change kt2 with curr
158 kt2 = curr; 150 kt2 = curr;
159 // charge2 = charge; << 151 charge2 = charge;
160 dist2 = dist; 152 dist2 = dist;
161 } 153 }
162 154
163 theAbsorbers->clear(); // do not delete trac 155 theAbsorbers->clear(); // do not delete tracks in theAbsorbers vector!
164 if((kt1 == NULL) || (kt2 == NULL)) 156 if((kt1 == NULL) || (kt2 == NULL))
165 return false; 157 return false;
166 158
167 theAbsorbers->push_back(kt1); 159 theAbsorbers->push_back(kt1);
168 theAbsorbers->push_back(kt2); 160 theAbsorbers->push_back(kt2);
169 return true; 161 return true;
170 } 162 }
171 163
172 164
173 165
174 G4bool G4Absorber::FindProducts(G4KineticTrack 166 G4bool G4Absorber::FindProducts(G4KineticTrack & kt)
175 { 167 {
176 // Choose the products type 168 // Choose the products type
177 const G4ParticleDefinition * prod1; << 169 G4ParticleDefinition * prod1;
178 const G4ParticleDefinition * prod2; << 170 G4ParticleDefinition * prod2;
179 G4KineticTrack * abs1 = (*theAbsorbers)[0]; 171 G4KineticTrack * abs1 = (*theAbsorbers)[0];
180 G4KineticTrack * abs2 = (*theAbsorbers)[1]; 172 G4KineticTrack * abs2 = (*theAbsorbers)[1];
181 173
182 G4double charge = kt.GetDefinition()->GetPDG 174 G4double charge = kt.GetDefinition()->GetPDGCharge();
183 if(charge == eplus) 175 if(charge == eplus)
184 { // a neutron become proton 176 { // a neutron become proton
185 prod1 = G4Proton::Proton(); 177 prod1 = G4Proton::Proton();
186 if(abs1->GetDefinition() == G4Neutron::Neu 178 if(abs1->GetDefinition() == G4Neutron::Neutron())
187 prod2 = abs2->GetDefinition(); 179 prod2 = abs2->GetDefinition();
188 else 180 else
189 prod2 = G4Proton::Proton(); 181 prod2 = G4Proton::Proton();
190 } 182 }
191 else if(charge == -eplus) 183 else if(charge == -eplus)
192 { // a proton become neutron 184 { // a proton become neutron
193 prod1 = G4Neutron::Neutron(); 185 prod1 = G4Neutron::Neutron();
194 if(abs1->GetDefinition() == G4Proton::Prot 186 if(abs1->GetDefinition() == G4Proton::Proton())
195 prod2 = abs2->GetDefinition(); 187 prod2 = abs2->GetDefinition();
196 else 188 else
197 prod2 = G4Neutron::Neutron(); 189 prod2 = G4Neutron::Neutron();
198 } 190 }
199 else // charge = 0: leave particle types un 191 else // charge = 0: leave particle types unchenged
200 { 192 {
201 prod1 = abs1->GetDefinition(); 193 prod1 = abs1->GetDefinition();
202 prod2 = abs2->GetDefinition(); 194 prod2 = abs2->GetDefinition();
203 } 195 }
204 196
205 // Translate to the CMS frame 197 // Translate to the CMS frame
206 G4LorentzVector momLab = kt.Get4Momentum()+a 198 G4LorentzVector momLab = kt.Get4Momentum()+abs1->Get4Momentum()+
207 abs2->Get4Momentum(); 199 abs2->Get4Momentum();
208 G4LorentzRotation toCMSFrame((-1)*momLab.boo 200 G4LorentzRotation toCMSFrame((-1)*momLab.boostVector());
209 G4LorentzRotation toLabFrame(momLab.boostVec 201 G4LorentzRotation toLabFrame(momLab.boostVector());
210 G4LorentzVector momCMS = toCMSFrame*momLab; 202 G4LorentzVector momCMS = toCMSFrame*momLab;
211 203
212 // Evaluate the final momentum of products 204 // Evaluate the final momentum of products
213 G4double ms1 = prod1->GetPDGMass(); << 205 G4double m1 = prod1->GetPDGMass();
214 G4double ms2 = prod2->GetPDGMass(); << 206 G4double m2 = prod2->GetPDGMass();
215 G4double e0 = momCMS.e(); 207 G4double e0 = momCMS.e();
216 G4double squareP = (e0*e0*e0*e0-2*e0*e0*(ms1 << 208 G4double squareP = (e0*e0*e0*e0-2*e0*e0*(m1*m1+m2*m2)+
217 (ms2*ms2-ms1*ms1)*(ms2*ms2-ms1*ms1))/(4*e0 << 209 (m2*m2-m1*m1)*(m2*m2-m1*m1))/(4*e0*e0);
218 // if(squareP < 0) // should never happen 210 // if(squareP < 0) // should never happen
219 // squareP = 0; 211 // squareP = 0;
220 G4ThreeVector mom1CMS = GetRandomDirection() 212 G4ThreeVector mom1CMS = GetRandomDirection();
221 mom1CMS = std::sqrt(squareP)*mom1CMS; 213 mom1CMS = std::sqrt(squareP)*mom1CMS;
222 G4LorentzVector final4Mom1CMS(mom1CMS, std:: << 214 G4LorentzVector final4Mom1CMS(mom1CMS, std::sqrt(squareP+m1*m1));
223 G4LorentzVector final4Mom2CMS((-1)*mom1CMS, << 215 G4LorentzVector final4Mom2CMS((-1)*mom1CMS, std::sqrt(squareP+m2*m2));
224 216
225 // Go back to the lab frame 217 // Go back to the lab frame
226 G4LorentzVector mom1 = toLabFrame*final4Mom1 218 G4LorentzVector mom1 = toLabFrame*final4Mom1CMS;
227 G4LorentzVector mom2 = toLabFrame*final4Mom2 219 G4LorentzVector mom2 = toLabFrame*final4Mom2CMS;
228 220
229 // ------ debug 221 // ------ debug
230 /* 222 /*
231 G4LorentzVector temp = mom1+mom2; 223 G4LorentzVector temp = mom1+mom2;
232 224
233 cout << (1/MeV)*momLab.x() << " " << (1/MeV) 225 cout << (1/MeV)*momLab.x() << " " << (1/MeV)*momLab.y() << " "
234 << (1/MeV)*momLab.z() << " " << (1/MeV) 226 << (1/MeV)*momLab.z() << " " << (1/MeV)*momLab.t() << " "
235 << (1/MeV)*momLab.vect().mag() << " " < 227 << (1/MeV)*momLab.vect().mag() << " " << (1/MeV)*momLab.mag() << " "
236 << (1/MeV)*temp.x() << " " << (1/MeV)*t 228 << (1/MeV)*temp.x() << " " << (1/MeV)*temp.y() << " "
237 << (1/MeV)*temp.z() << " " << (1/MeV)*t 229 << (1/MeV)*temp.z() << " " << (1/MeV)*temp.t() << " "
238 << (1/MeV)*temp.vect().mag() << " " << 230 << (1/MeV)*temp.vect().mag() << " " << (1/MeV)*temp.mag() << " "
239 << (1/MeV)*std::sqrt(squareP) << endl; 231 << (1/MeV)*std::sqrt(squareP) << endl;
240 232
241 */ 233 */
242 // ------ end debug 234 // ------ end debug
243 235
244 // Build two new kinetic tracks and add to pro 236 // Build two new kinetic tracks and add to products
245 G4KineticTrack * kt1 = new G4KineticTrack(pr 237 G4KineticTrack * kt1 = new G4KineticTrack(prod1, 0., abs1->GetPosition(),
246 mom1); 238 mom1);
247 G4KineticTrack * kt2 = new G4KineticTrack(pr 239 G4KineticTrack * kt2 = new G4KineticTrack(prod2, 0., abs2->GetPosition(),
248 mom2); 240 mom2);
249 // ------ debug 241 // ------ debug
250 /* 242 /*
251 G4LorentzVector initialMom1 = abs1->Get4Mome 243 G4LorentzVector initialMom1 = abs1->Get4Momentum();
252 G4LorentzVector initialMom2 = abs2->Get4Mome 244 G4LorentzVector initialMom2 = abs2->Get4Momentum();
253 G4LorentzVector pion4MomCMS = toCMSFrame*kt. 245 G4LorentzVector pion4MomCMS = toCMSFrame*kt.Get4Momentum();
254 cout << (1/MeV)*initialMom1.x() << " " << (1 246 cout << (1/MeV)*initialMom1.x() << " " << (1/MeV)*initialMom1.y() << " "
255 << (1/MeV)*initialMom1.z() << " " << (1 247 << (1/MeV)*initialMom1.z() << " " << (1/MeV)*initialMom1.e() << " "
256 << (1/MeV)*initialMom1.vect().mag() << 248 << (1/MeV)*initialMom1.vect().mag() << " "
257 << (1/MeV)*initialMom2.x() << " " << (1 249 << (1/MeV)*initialMom2.x() << " " << (1/MeV)*initialMom2.y() << " "
258 << (1/MeV)*initialMom2.z() << " " << (1 250 << (1/MeV)*initialMom2.z() << " " << (1/MeV)*initialMom2.e() << " "
259 << (1/MeV)*initialMom2.vect().mag() << 251 << (1/MeV)*initialMom2.vect().mag() << " "
260 << (1/MeV)*mom1.x() << " " << (1/MeV)*m 252 << (1/MeV)*mom1.x() << " " << (1/MeV)*mom1.y() << " "
261 << (1/MeV)*mom1.z() << " " << (1/MeV)*m 253 << (1/MeV)*mom1.z() << " " << (1/MeV)*mom1.e() << " "
262 << (1/MeV)*mom1.vect().mag() << " " 254 << (1/MeV)*mom1.vect().mag() << " "
263 << (1/MeV)*mom2.x() << " " << (1/MeV)*m 255 << (1/MeV)*mom2.x() << " " << (1/MeV)*mom2.y() << " "
264 << (1/MeV)*mom2.z() << " " << (1/MeV)*m 256 << (1/MeV)*mom2.z() << " " << (1/MeV)*mom2.e() << " "
265 << (1/MeV)*mom2.vect().mag() << " " 257 << (1/MeV)*mom2.vect().mag() << " "
266 << (1/MeV)*pion4MomCMS.x() << " " << (1 258 << (1/MeV)*pion4MomCMS.x() << " " << (1/MeV)*pion4MomCMS.y() << " "
267 << (1/MeV)*pion4MomCMS.z() << " " << (1 259 << (1/MeV)*pion4MomCMS.z() << " " << (1/MeV)*pion4MomCMS.e() << " "
268 << (1/MeV)*pion4MomCMS.vect().mag() << 260 << (1/MeV)*pion4MomCMS.vect().mag() << " "
269 << (1/MeV)*final4Mom1CMS.x() << " " << 261 << (1/MeV)*final4Mom1CMS.x() << " " << (1/MeV)*final4Mom1CMS.y() << " "
270 << (1/MeV)*final4Mom1CMS.z() << " " << 262 << (1/MeV)*final4Mom1CMS.z() << " " << (1/MeV)*final4Mom1CMS.e() << " "
271 << (1/MeV)*final4Mom1CMS.vect().mag() < 263 << (1/MeV)*final4Mom1CMS.vect().mag() << " "
272 << (1/MeV)*final4Mom2CMS.x() << " " << 264 << (1/MeV)*final4Mom2CMS.x() << " " << (1/MeV)*final4Mom2CMS.y() << " "
273 << (1/MeV)*final4Mom2CMS.z() << " " << 265 << (1/MeV)*final4Mom2CMS.z() << " " << (1/MeV)*final4Mom2CMS.e() << " "
274 << (1/MeV)*final4Mom2CMS.vect().mag() < 266 << (1/MeV)*final4Mom2CMS.vect().mag() << endl;
275 */ 267 */
276 // ------ end debug 268 // ------ end debug
277 269
278 theProducts->clear(); 270 theProducts->clear();
279 theProducts->push_back(kt1); 271 theProducts->push_back(kt1);
280 theProducts->push_back(kt2); 272 theProducts->push_back(kt2);
281 return true; 273 return true;
282 } 274 }
283 275
284 276
285 277
286 G4ThreeVector G4Absorber::GetRandomDirection() 278 G4ThreeVector G4Absorber::GetRandomDirection()
287 { 279 {
288 G4double theta = 2.0*G4UniformRand()-1.0; 280 G4double theta = 2.0*G4UniformRand()-1.0;
289 theta = std::acos(theta); 281 theta = std::acos(theta);
290 G4double phi = G4UniformRand()*2*pi; 282 G4double phi = G4UniformRand()*2*pi;
291 G4ThreeVector direction(std::sin(theta)*std: 283 G4ThreeVector direction(std::sin(theta)*std::cos(phi), std::sin(theta)*std::sin(phi), std::cos(theta));
292 return direction; 284 return direction;
293 } 285 }
294 286
295 287
296 288
297 289
298 290
299 291
300 292
301 293