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25 // 25 //
26 // 26 //
>> 27 // $Id: G4Decay.cc,v 1.22 2006/06/29 19:31:16 gunter Exp $
>> 28 // GEANT4 tag $Name: geant4-08-02 $
27 // 29 //
28 // 30 //
29 // ------------------------------------------- 31 // --------------------------------------------------------------
30 // GEANT 4 class implementation file 32 // GEANT 4 class implementation file
31 // 33 //
32 // History: first implementation, based o 34 // History: first implementation, based on object model of
33 // 2nd December 1995, G.Cosmo 35 // 2nd December 1995, G.Cosmo
34 // 7 July 1996 H.Kurashige 36 // 7 July 1996 H.Kurashige
35 // ------------------------------------------- 37 // ------------------------------------------------------------
36 // remove BuildPhysicsTable() 28 Nov. 1997 38 // remove BuildPhysicsTable() 28 Nov. 1997 H.Kurashige
37 // change DBL_EPSIRON to DBL_MIN 14 Dec. 19 39 // change DBL_EPSIRON to DBL_MIN 14 Dec. 1997 H.Kurashige
38 // modified for new ParticleChange 12 Mar. 1 40 // modified for new ParticleChange 12 Mar. 1998 H.Kurashige
39 // modified for "GoodForTrackingFlag" 19 Jun 41 // modified for "GoodForTrackingFlag" 19 June 1998 H.Kurashige
40 // rename thePhysicsTable to aPhyscisTable 2 42 // rename thePhysicsTable to aPhyscisTable 2 Aug. 1998 H.Kurashige
41 // modified IsApplicable in order to protect 43 // modified IsApplicable in order to protect the decay from registered
42 // to resonances 12 Dec. 1998 H.Kurashi 44 // to resonances 12 Dec. 1998 H.Kurashige
43 // remove G4ParticleMomentum 6 Feb. 99 H.Ku 45 // remove G4ParticleMomentum 6 Feb. 99 H.Kurashige
44 // modified IsApplicable to activate G4Deca 46 // modified IsApplicable to activate G4Decay for resonances 1 Mar. 00 H.Kurashige
45 // Add External Decayer 23 Feb. 2001 47 // Add External Decayer 23 Feb. 2001 H.Kurashige
46 // change LowestBinValue,HighestBinValue and 48 // change LowestBinValue,HighestBinValue and TotBin(200) 9 Feb. 2002
47 // 49 //
48 50
49 #include "G4Decay.hh" 51 #include "G4Decay.hh"
50 <<
51 #include "G4PhysicalConstants.hh" <<
52 #include "G4SystemOfUnits.hh" <<
53 #include "G4DynamicParticle.hh" 52 #include "G4DynamicParticle.hh"
54 #include "G4DecayProducts.hh" 53 #include "G4DecayProducts.hh"
55 #include "G4DecayTable.hh" 54 #include "G4DecayTable.hh"
56 #include "G4VDecayChannel.hh" <<
57 #include "G4PhysicsLogVector.hh" 55 #include "G4PhysicsLogVector.hh"
58 #include "G4ParticleChangeForDecay.hh" 56 #include "G4ParticleChangeForDecay.hh"
59 #include "G4VExtDecayer.hh" 57 #include "G4VExtDecayer.hh"
60 58
61 // constructor 59 // constructor
62 G4Decay::G4Decay(const G4String& processName) 60 G4Decay::G4Decay(const G4String& processName)
63 :G4VRestDiscret 61 :G4VRestDiscreteProcess(processName, fDecay),
64 verboseLevel(1), 62 verboseLevel(1),
65 HighestValue(2 63 HighestValue(20.0),
66 fRemainderLifeTime(-1.0), << 64 pExtDecayer(0)
67 pExtDecayer(nu <<
68 { 65 {
69 // set Process Sub Type <<
70 SetProcessSubType(static_cast<int>(DECAY)); <<
71 <<
72 #ifdef G4VERBOSE 66 #ifdef G4VERBOSE
73 if (GetVerboseLevel()>1) { 67 if (GetVerboseLevel()>1) {
74 G4cout << "G4Decay constructor " << " Na << 68 G4cerr << "G4Decay constructor " << " Name:" << processName << G4endl;
75 } 69 }
76 #endif 70 #endif
77 <<
78 pParticleChange = &fParticleChangeForDecay; 71 pParticleChange = &fParticleChangeForDecay;
79 } 72 }
80 73
81 G4Decay::~G4Decay() 74 G4Decay::~G4Decay()
82 { 75 {
83 if (pExtDecayer != nullptr) { << 76 if (pExtDecayer) {
84 delete pExtDecayer; 77 delete pExtDecayer;
85 } 78 }
86 } 79 }
87 80
88 G4bool G4Decay::IsApplicable(const G4ParticleD 81 G4bool G4Decay::IsApplicable(const G4ParticleDefinition& aParticleType)
89 { 82 {
90 // check if the particle is stable? 83 // check if the particle is stable?
91 if (aParticleType.GetPDGLifeTime() <0.0) { 84 if (aParticleType.GetPDGLifeTime() <0.0) {
92 return false; 85 return false;
93 } else if (aParticleType.GetPDGMass() <= 0. 86 } else if (aParticleType.GetPDGMass() <= 0.0*MeV) {
94 return false; 87 return false;
95 } else { 88 } else {
96 return true; 89 return true;
97 } 90 }
98 } 91 }
99 92
100 G4double G4Decay::GetMeanLifeTime(const G4Trac 93 G4double G4Decay::GetMeanLifeTime(const G4Track& aTrack ,
101 G4ForceCondi 94 G4ForceCondition*)
102 { 95 {
103 // returns the mean free path in GEANT4 int 96 // returns the mean free path in GEANT4 internal units
104 G4double meanlife; 97 G4double meanlife;
105 98
106 // get particle 99 // get particle
107 const G4DynamicParticle* aParticle = aTrack 100 const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
108 const G4ParticleDefinition* aParticleDef = << 101 G4ParticleDefinition* aParticleDef = aParticle->GetDefinition();
109 G4double aLife = aParticleDef->GetPDGLifeTi 102 G4double aLife = aParticleDef->GetPDGLifeTime();
110 103
111 // check if the particle is stable? 104 // check if the particle is stable?
112 if (aParticleDef->GetPDGStable()) { 105 if (aParticleDef->GetPDGStable()) {
113 //1000000 times the life time of the unive << 106 meanlife = DBL_MAX;
114 meanlife = 1e24 * s; <<
115 107
116 } else { 108 } else {
117 meanlife = aLife; 109 meanlife = aLife;
118 } 110 }
119 111
120 #ifdef G4VERBOSE 112 #ifdef G4VERBOSE
121 if (GetVerboseLevel()>1) { 113 if (GetVerboseLevel()>1) {
122 G4cout << "mean life time: "<< meanlife/n 114 G4cout << "mean life time: "<< meanlife/ns << "[ns]" << G4endl;
123 } 115 }
124 #endif 116 #endif
125 117
126 return meanlife; 118 return meanlife;
127 } 119 }
128 120
129 G4double G4Decay::GetMeanFreePath(const G4Trac 121 G4double G4Decay::GetMeanFreePath(const G4Track& aTrack,G4double, G4ForceCondition*)
130 { 122 {
131 // get particle 123 // get particle
132 const G4DynamicParticle* aParticle = aTrack 124 const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
133 const G4ParticleDefinition* aParticleDef = << 125 G4ParticleDefinition* aParticleDef = aParticle->GetDefinition();
134 G4double aMass = aParticle->GetMass(); 126 G4double aMass = aParticle->GetMass();
135 G4double aLife = aParticleDef->GetPDGLifeTi 127 G4double aLife = aParticleDef->GetPDGLifeTime();
136 128
137 129
138 // returns the mean free path in GEANT4 in 130 // returns the mean free path in GEANT4 internal units
139 G4double pathlength; 131 G4double pathlength;
140 G4double aCtau = c_light * aLife; 132 G4double aCtau = c_light * aLife;
141 133
142 // check if the particle is stable? 134 // check if the particle is stable?
143 if (aParticleDef->GetPDGStable()) { 135 if (aParticleDef->GetPDGStable()) {
144 pathlength = DBL_MAX; 136 pathlength = DBL_MAX;
145 137
146 //check if the particle has very short life 138 //check if the particle has very short life time ?
147 } else if (aCtau < DBL_MIN) { 139 } else if (aCtau < DBL_MIN) {
148 pathlength = DBL_MIN; 140 pathlength = DBL_MIN;
149 141
150 } else { 142 } else {
151 //calculate the mean free path 143 //calculate the mean free path
152 // by using normalized kinetic energy (= E 144 // by using normalized kinetic energy (= Ekin/mass)
153 G4double rKineticEnergy = aParticle->Ge 145 G4double rKineticEnergy = aParticle->GetKineticEnergy()/aMass;
154 if ( rKineticEnergy > HighestValue) { 146 if ( rKineticEnergy > HighestValue) {
155 // gamma >> 1 147 // gamma >> 1
156 pathlength = ( rKineticEnergy + 1.0)* a 148 pathlength = ( rKineticEnergy + 1.0)* aCtau;
157 } else if ( rKineticEnergy < DBL_MIN ) { 149 } else if ( rKineticEnergy < DBL_MIN ) {
158 // too slow particle 150 // too slow particle
159 #ifdef G4VERBOSE 151 #ifdef G4VERBOSE
160 if (GetVerboseLevel()>1) { 152 if (GetVerboseLevel()>1) {
161 G4cout << "G4Decay::GetMeanFreePath() !!p << 153 G4cerr << "G4Decay::GetMeanFreePath() !!particle stops!!";
162 G4cout << aParticleDef->GetParticleNa << 154 G4cerr << aParticleDef->GetParticleName() << G4endl;
163 G4cout << "KineticEnergy:" << aParticle->Ge << 155 G4cerr << "KineticEnergy:" << aParticle->GetKineticEnergy()/GeV <<"[GeV]";
164 } 156 }
165 #endif 157 #endif
166 pathlength = DBL_MIN; 158 pathlength = DBL_MIN;
167 } else { 159 } else {
168 // beta <1 160 // beta <1
169 pathlength = (aParticle->GetTotalMoment 161 pathlength = (aParticle->GetTotalMomentum())/aMass*aCtau ;
170 } 162 }
171 } 163 }
172 return pathlength; 164 return pathlength;
173 } 165 }
174 166
175 void G4Decay::BuildPhysicsTable(const G4Partic 167 void G4Decay::BuildPhysicsTable(const G4ParticleDefinition&)
176 { 168 {
177 return; 169 return;
178 } 170 }
179 171
180 G4VParticleChange* G4Decay::DecayIt(const G4Tr 172 G4VParticleChange* G4Decay::DecayIt(const G4Track& aTrack, const G4Step& )
181 { 173 {
182 // The DecayIt() method returns by pointer a 174 // The DecayIt() method returns by pointer a particle-change object.
183 // Units are expressed in GEANT4 internal un 175 // Units are expressed in GEANT4 internal units.
184 176
185 // Initialize ParticleChange 177 // Initialize ParticleChange
186 // all members of G4VParticleChange are 178 // all members of G4VParticleChange are set to equal to
187 // corresponding member in G4Track 179 // corresponding member in G4Track
188 fParticleChangeForDecay.Initialize(aTrack); 180 fParticleChangeForDecay.Initialize(aTrack);
189 181
190 // get particle 182 // get particle
191 const G4DynamicParticle* aParticle = aTrack. 183 const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
192 const G4ParticleDefinition* aParticleDef = a << 184 G4ParticleDefinition* aParticleDef = aParticle->GetDefinition();
193 185
194 // check if the particle is stable 186 // check if the particle is stable
195 if (aParticleDef->GetPDGStable()) return &fP 187 if (aParticleDef->GetPDGStable()) return &fParticleChangeForDecay ;
196 188
197 189
198 //check if thePreAssignedDecayProducts exist 190 //check if thePreAssignedDecayProducts exists
199 const G4DecayProducts* o_products = (aPartic 191 const G4DecayProducts* o_products = (aParticle->GetPreAssignedDecayProducts());
200 G4bool isPreAssigned = (o_products != nullpt << 192 G4bool isPreAssigned = (o_products != 0);
201 G4DecayProducts* products = nullptr; << 193 G4DecayProducts* products = 0;
202 194
203 // decay table 195 // decay table
204 G4DecayTable *decaytable = aParticleDef->G 196 G4DecayTable *decaytable = aParticleDef->GetDecayTable();
205 197
206 // check if external decayer exists 198 // check if external decayer exists
207 G4bool isExtDecayer = (decaytable == nullptr << 199 G4bool isExtDecayer = (decaytable == 0) && (pExtDecayer !=0);
208 200
209 // Error due to NO Decay Table 201 // Error due to NO Decay Table
210 if ( (decaytable == nullptr) && !isExtDecaye << 202 if ( (decaytable == 0) && !isExtDecayer &&!isPreAssigned ){
>> 203 #ifdef G4VERBOSE
211 if (GetVerboseLevel()>0) { 204 if (GetVerboseLevel()>0) {
212 G4cout << "G4Decay::DoIt : decay table << 205 G4cerr << "G4Decay::DoIt : decay table not defined for ";
213 G4cout << aParticle->GetDefinition()->Ge << 206 G4cerr << aParticle->GetDefinition()->GetParticleName()<< G4endl;
214 } 207 }
215 G4ExceptionDescription ed; << 208 #endif
216 ed << "For " << aParticle->GetDefinition() <<
217 << " decay probability exist but decay <<
218 << "- the particle will be killed;\n" <<
219 << " isExtDecayer: " << isExtDecayer <<
220 << "; isPreAssigned: " << isPreAssigned <<
221 G4Exception( "G4Decay::DecayIt ", <<
222 "DECAY101",JustWarning, ed); <<
223 <<
224 fParticleChangeForDecay.SetNumberOfSeconda 209 fParticleChangeForDecay.SetNumberOfSecondaries(0);
225 // Kill the parent particle 210 // Kill the parent particle
226 fParticleChangeForDecay.ProposeTrackStatus 211 fParticleChangeForDecay.ProposeTrackStatus( fStopAndKill ) ;
227 fParticleChangeForDecay.ProposeLocalEnergy 212 fParticleChangeForDecay.ProposeLocalEnergyDeposit(0.0);
228 213
229 ClearNumberOfInteractionLengthLeft(); 214 ClearNumberOfInteractionLengthLeft();
230 return &fParticleChangeForDecay ; 215 return &fParticleChangeForDecay ;
231 } 216 }
232 217
233 if (isPreAssigned) { 218 if (isPreAssigned) {
234 // copy decay products 219 // copy decay products
235 products = new G4DecayProducts(*o_products 220 products = new G4DecayProducts(*o_products);
236 } else if ( isExtDecayer ) { 221 } else if ( isExtDecayer ) {
237 // decay according to external decayer 222 // decay according to external decayer
238 products = pExtDecayer->ImportDecayProduct 223 products = pExtDecayer->ImportDecayProducts(aTrack);
239 } else { 224 } else {
240 // Decay according to decay table. << 225 // decay acoording to decay table
241 // Keep trying to choose a candidate decay << 226 // choose a decay channel
242 // of the decaying particle is below the s << 227 G4VDecayChannel *decaychannel = decaytable->SelectADecayChannel();
243 // candidate daughter particles. << 228 if (decaychannel == 0 ){
244 // This is needed because the decay table <<
245 // the assumption of nominal PDG masses, b <<
246 // a dynamic masses well below its nominal <<
247 // some of its decay channels can be below <<
248 // Note that, for simplicity, we ignore he <<
249 // one or more of the candidate daughter p <<
250 // wide resonance. However, if this is the <<
251 // accepted, then the masses of the resona <<
252 // be sampled by taking into account their <<
253 G4VDecayChannel* decaychannel = nullptr; <<
254 G4double massParent = aParticle->GetMass() <<
255 decaychannel = decaytable->SelectADecayCha <<
256 if ( decaychannel == nullptr) { <<
257 // decay channel not found 229 // decay channel not found
258 G4ExceptionDescription ed; << 230 G4Exception("G4Decay::DoIt : can not determine decay channel ");
259 ed << "Can not determine decay channel f <<
260 << aParticleDef->GetParticleName() << G4end <<
261 << " mass of dynamic particle: " <<
262 << massParent/GeV << " (GEV)" << G4endl <<
263 << " dacay table has " << decaytable->entr <<
264 << " entries" << G4endl; <<
265 G4double checkedmass=massParent; <<
266 if (massParent < 0.) { <<
267 checkedmass=aParticleDef->GetPDGMass(); <<
268 ed << "Using PDG mass ("<<checkedmass/GeV <<
269 << "(GeV)) in IsOKWithParentMass" << G4en <<
270 } <<
271 for (G4int ic =0;ic <decaytable->entries <<
272 G4VDecayChannel * dc= decaytable->GetDecayCh <<
273 ed << ic << ": BR " << dc->GetBR() << ", IsO <<
274 << dc->IsOKWithParentMass(checkedmass) <<
275 << ", --> "; <<
276 G4int ndaughters=dc->GetNumberOfDaughters(); <<
277 for (G4int id=0;id<ndaughters;++id) { <<
278 if (id>0) ed << " + "; // seperator, exc <<
279 ed << dc->GetDaughterName(id); <<
280 } <<
281 ed << G4endl; <<
282 } <<
283 G4Exception("G4Decay::DoIt", "DECAY003", <<
284 } else { 231 } else {
285 // execute DecayIt() 232 // execute DecayIt()
286 #ifdef G4VERBOSE 233 #ifdef G4VERBOSE
287 G4int temp = decaychannel->GetVerboseLev 234 G4int temp = decaychannel->GetVerboseLevel();
288 if (GetVerboseLevel()>1) { 235 if (GetVerboseLevel()>1) {
289 G4cout << "G4Decay::DoIt : selected decay c << 236 G4cerr << "G4Decay::DoIt : selected decay channel addr:" << decaychannel <<G4endl;
290 << decaychannel <<G4endl; <<
291 decaychannel->SetVerboseLevel(GetVerboseLeve 237 decaychannel->SetVerboseLevel(GetVerboseLevel());
292 } 238 }
293 #endif 239 #endif
294 products = decaychannel->DecayIt(aPartic 240 products = decaychannel->DecayIt(aParticle->GetMass());
295 #ifdef G4VERBOSE 241 #ifdef G4VERBOSE
296 if (GetVerboseLevel()>1) { 242 if (GetVerboseLevel()>1) {
297 decaychannel->SetVerboseLevel(temp); 243 decaychannel->SetVerboseLevel(temp);
298 } 244 }
299 #endif 245 #endif
300 #ifdef G4VERBOSE 246 #ifdef G4VERBOSE
301 if (GetVerboseLevel()>2) { << 247 // for debug
302 if (! products->IsChecked() ) products->Dump << 248 //if (! products->IsChecked() ) products->DumpInfo();
303 } <<
304 #endif 249 #endif
305 } 250 }
306 } 251 }
307 252
308 // get parent particle information ......... 253 // get parent particle information ...................................
309 G4double ParentEnergy = aParticle->GetTot 254 G4double ParentEnergy = aParticle->GetTotalEnergy();
310 G4double ParentMass = aParticle->GetMas <<
311 if (ParentEnergy < ParentMass) { <<
312 G4ExceptionDescription ed; <<
313 ed << "Total Energy is less than its mass <<
314 << "\n Particle: " << aParticle->GetDef <<
315 << "\n Energy:" << ParentEnergy/MeV <<
316 << "\n Mass:" << ParentMass/MeV << <<
317 G4Exception( "G4Decay::DecayIt ", <<
318 "DECAY102",JustWarning, ed); <<
319 ParentEnergy = ParentMass; <<
320 } <<
321 <<
322 G4ThreeVector ParentDirection(aParticle->Get 255 G4ThreeVector ParentDirection(aParticle->GetMomentumDirection());
323 256
324 //boost all decay products to laboratory fra 257 //boost all decay products to laboratory frame
325 G4double energyDeposit = 0.0; 258 G4double energyDeposit = 0.0;
326 G4double finalGlobalTime = aTrack.GetGlobalT 259 G4double finalGlobalTime = aTrack.GetGlobalTime();
327 G4double finalLocalTime = aTrack.GetLocalTim <<
328 if (aTrack.GetTrackStatus() == fStopButAlive 260 if (aTrack.GetTrackStatus() == fStopButAlive ){
329 // AtRest case 261 // AtRest case
330 finalGlobalTime += fRemainderLifeTime; 262 finalGlobalTime += fRemainderLifeTime;
331 finalLocalTime += fRemainderLifeTime; <<
332 energyDeposit += aParticle->GetKineticEner 263 energyDeposit += aParticle->GetKineticEnergy();
333 if (isPreAssigned) products->Boost( Parent 264 if (isPreAssigned) products->Boost( ParentEnergy, ParentDirection);
334 } else { 265 } else {
335 // PostStep case 266 // PostStep case
336 if (!isExtDecayer) products->Boost( Parent 267 if (!isExtDecayer) products->Boost( ParentEnergy, ParentDirection);
337 } 268 }
338 // set polarization for daughter particles <<
339 DaughterPolarization(aTrack, products); <<
340 <<
341 269
342 //add products in fParticleChangeForDecay 270 //add products in fParticleChangeForDecay
343 G4int numberOfSecondaries = products->entrie 271 G4int numberOfSecondaries = products->entries();
344 fParticleChangeForDecay.SetNumberOfSecondari 272 fParticleChangeForDecay.SetNumberOfSecondaries(numberOfSecondaries);
345 #ifdef G4VERBOSE 273 #ifdef G4VERBOSE
346 if (GetVerboseLevel()>1) { 274 if (GetVerboseLevel()>1) {
347 G4cout << "G4Decay::DoIt : Decay vertex : << 275 G4cerr << "G4Decay::DoIt : Decay vertex :";
348 G4cout << " Time: " << finalGlobalTime/ns << 276 G4cerr << " Time: " << finalGlobalTime/ns << "[ns]";
349 G4cout << " X:" << (aTrack.GetPosition()). << 277 G4cerr << " X:" << (aTrack.GetPosition()).x() /cm << "[cm]";
350 G4cout << " Y:" << (aTrack.GetPosition()). << 278 G4cerr << " Y:" << (aTrack.GetPosition()).y() /cm << "[cm]";
351 G4cout << " Z:" << (aTrack.GetPosition()). << 279 G4cerr << " Z:" << (aTrack.GetPosition()).z() /cm << "[cm]";
352 G4cout << G4endl; << 280 G4cerr << G4endl;
353 G4cout << "G4Decay::DoIt : decay products << 281 G4cerr << "G4Decay::DoIt : decay products in Lab. Frame" << G4endl;
354 products->DumpInfo(); 282 products->DumpInfo();
355 } 283 }
356 #endif 284 #endif
357 G4int index; 285 G4int index;
358 G4ThreeVector currentPosition; 286 G4ThreeVector currentPosition;
359 const G4TouchableHandle thand = aTrack.GetTo 287 const G4TouchableHandle thand = aTrack.GetTouchableHandle();
360 for (index=0; index < numberOfSecondaries; i << 288 for (index=0; index < numberOfSecondaries; index++)
361 // get current position of the track << 289 {
362 currentPosition = aTrack.GetPosition(); << 290 // get current position of the track
363 // create a new track object << 291 currentPosition = aTrack.GetPosition();
364 G4Track* secondary = new G4Track( products << 292 // create a new track object
>> 293 G4Track* secondary = new G4Track( products->PopProducts(),
365 finalGlobalTime , 294 finalGlobalTime ,
366 currentPosition ); 295 currentPosition );
367 // switch on good for tracking flag << 296 // switch on good for tracking flag
368 secondary->SetGoodForTrackingFlag(); << 297 secondary->SetGoodForTrackingFlag();
369 secondary->SetTouchableHandle(thand); << 298 secondary->SetTouchableHandle(thand);
370 // add the secondary track in the List << 299 // add the secondary track in the List
371 fParticleChangeForDecay.AddSecondary(secon << 300 fParticleChangeForDecay.AddSecondary(secondary);
372 } 301 }
373 delete products; 302 delete products;
374 << 303
375 // Kill the parent particle 304 // Kill the parent particle
376 fParticleChangeForDecay.ProposeTrackStatus( 305 fParticleChangeForDecay.ProposeTrackStatus( fStopAndKill ) ;
377 fParticleChangeForDecay.ProposeLocalEnergyDe 306 fParticleChangeForDecay.ProposeLocalEnergyDeposit(energyDeposit);
378 fParticleChangeForDecay.ProposeLocalTime( fi << 307 fParticleChangeForDecay.ProposeGlobalTime( finalGlobalTime );
379 <<
380 // Clear NumberOfInteractionLengthLeft 308 // Clear NumberOfInteractionLengthLeft
381 ClearNumberOfInteractionLengthLeft(); 309 ClearNumberOfInteractionLengthLeft();
382 << 310
383 return &fParticleChangeForDecay ; 311 return &fParticleChangeForDecay ;
384 } 312 }
385 313
386 void G4Decay::DaughterPolarization(const G4Tra <<
387 { <<
388 // empty implementation <<
389 } <<
390 <<
391 <<
392 314
393 void G4Decay::StartTracking(G4Track*) 315 void G4Decay::StartTracking(G4Track*)
394 { 316 {
395 currentInteractionLength = -1.0; 317 currentInteractionLength = -1.0;
396 ResetNumberOfInteractionLengthLeft(); 318 ResetNumberOfInteractionLengthLeft();
397 319
398 fRemainderLifeTime = -1.0; 320 fRemainderLifeTime = -1.0;
399 } 321 }
400 322
401 void G4Decay::EndTracking() 323 void G4Decay::EndTracking()
402 { 324 {
403 // Clear NumberOfInteractionLengthLeft 325 // Clear NumberOfInteractionLengthLeft
404 ClearNumberOfInteractionLengthLeft(); 326 ClearNumberOfInteractionLengthLeft();
405 327
406 currentInteractionLength = -1.0; 328 currentInteractionLength = -1.0;
407 } 329 }
408 330
409 331
410 G4double G4Decay::PostStepGetPhysicalInteracti 332 G4double G4Decay::PostStepGetPhysicalInteractionLength(
411 const G4Track& tr 333 const G4Track& track,
412 G4double previo 334 G4double previousStepSize,
413 G4ForceCondition* 335 G4ForceCondition* condition
414 ) 336 )
415 { 337 {
>> 338
416 // condition is set to "Not Forced" 339 // condition is set to "Not Forced"
417 *condition = NotForced; 340 *condition = NotForced;
418 341
419 // pre-assigned Decay time 342 // pre-assigned Decay time
420 G4double pTime = track.GetDynamicParticle()- 343 G4double pTime = track.GetDynamicParticle()->GetPreAssignedDecayProperTime();
421 G4double aLife = track.GetDynamicParticle()- 344 G4double aLife = track.GetDynamicParticle()->GetDefinition()->GetPDGLifeTime();
422 345
423 if (pTime < 0.) { 346 if (pTime < 0.) {
424 // normal case 347 // normal case
425 if ( previousStepSize > 0.0){ 348 if ( previousStepSize > 0.0){
426 // subtract NumberOfInteractionLengthLef 349 // subtract NumberOfInteractionLengthLeft
427 SubtractNumberOfInteractionLengthLeft(pr 350 SubtractNumberOfInteractionLengthLeft(previousStepSize);
428 if(theNumberOfInteractionLengthLeft<0.){ 351 if(theNumberOfInteractionLengthLeft<0.){
429 theNumberOfInteractionLengthLeft=perMillion; 352 theNumberOfInteractionLengthLeft=perMillion;
430 } 353 }
431 fRemainderLifeTime = theNumberOfInteract 354 fRemainderLifeTime = theNumberOfInteractionLengthLeft*aLife;
432 } 355 }
433 // get mean free path 356 // get mean free path
434 currentInteractionLength = GetMeanFreePath 357 currentInteractionLength = GetMeanFreePath(track, previousStepSize, condition);
435 358
436 #ifdef G4VERBOSE 359 #ifdef G4VERBOSE
437 if ((currentInteractionLength <=0.0) || (v 360 if ((currentInteractionLength <=0.0) || (verboseLevel>2)){
438 G4cout << "G4Decay::PostStepGetPhysicalI 361 G4cout << "G4Decay::PostStepGetPhysicalInteractionLength " << G4endl;
439 track.GetDynamicParticle()->DumpInfo(); 362 track.GetDynamicParticle()->DumpInfo();
440 G4cout << " in Material " << track.GetM 363 G4cout << " in Material " << track.GetMaterial()->GetName() <<G4endl;
441 G4cout << "MeanFreePath = " << currentIn 364 G4cout << "MeanFreePath = " << currentInteractionLength/cm << "[cm]" <<G4endl;
442 } 365 }
443 #endif 366 #endif
444 367
445 G4double value; 368 G4double value;
446 if (currentInteractionLength <DBL_MAX) { 369 if (currentInteractionLength <DBL_MAX) {
447 value = theNumberOfInteractionLengthLeft 370 value = theNumberOfInteractionLengthLeft * currentInteractionLength;
448 //fRemainderLifeTime = theNumberOfIntera <<
449 } else { 371 } else {
450 value = DBL_MAX; 372 value = DBL_MAX;
451 } 373 }
452 374
453 return value; 375 return value;
454 376
455 } else { 377 } else {
456 //pre-assigned Decay time case 378 //pre-assigned Decay time case
457 // reminder proper time 379 // reminder proper time
458 fRemainderLifeTime = pTime - track.GetProp 380 fRemainderLifeTime = pTime - track.GetProperTime();
459 if (fRemainderLifeTime <= 0.0) fRemainderL << 381 if (fRemainderLifeTime <= 0.0) fRemainderLifeTime = DBL_MIN;
460 << 382
461 G4double rvalue=0.0; <<
462 // use pre-assigned Decay time to determin 383 // use pre-assigned Decay time to determine PIL
463 if (aLife>0.0) { << 384 return (fRemainderLifeTime/aLife)*GetMeanFreePath(track, previousStepSize, condition);
464 // ordinary particle <<
465 rvalue = (fRemainderLifeTime/aLife)*GetM <<
466 } else { <<
467 // shortlived particle <<
468 rvalue = c_light * fRemainderLifeTime; <<
469 // by using normalized kinetic energy (= <<
470 G4double aMass = track.GetDynamicParti <<
471 rvalue *= track.GetDynamicParticle()->Get <<
472 } <<
473 return rvalue; <<
474 } 385 }
475 } 386 }
476 387
477 G4double G4Decay::AtRestGetPhysicalInteraction 388 G4double G4Decay::AtRestGetPhysicalInteractionLength(
478 const G4Track& tr 389 const G4Track& track,
479 G4ForceCondition* 390 G4ForceCondition* condition
480 ) 391 )
481 { 392 {
482 // condition is set to "Not Forced" 393 // condition is set to "Not Forced"
483 *condition = NotForced; 394 *condition = NotForced;
484 395
485 G4double pTime = track.GetDynamicParticle()- 396 G4double pTime = track.GetDynamicParticle()->GetPreAssignedDecayProperTime();
486 if (pTime >= 0.) { 397 if (pTime >= 0.) {
487 fRemainderLifeTime = pTime - track.GetProp 398 fRemainderLifeTime = pTime - track.GetProperTime();
488 if (fRemainderLifeTime <= 0.0) fRemainderL 399 if (fRemainderLifeTime <= 0.0) fRemainderLifeTime = DBL_MIN;
489 } else { 400 } else {
490 fRemainderLifeTime = 401 fRemainderLifeTime =
491 theNumberOfInteractionLengthLeft * GetMe 402 theNumberOfInteractionLengthLeft * GetMeanLifeTime(track, condition);
492 } 403 }
493 return fRemainderLifeTime; 404 return fRemainderLifeTime;
494 } <<
495 <<
496 <<
497 void G4Decay::SetExtDecayer(G4VExtDecayer* val <<
498 { <<
499 pExtDecayer = val; <<
500 <<
501 // set Process Sub Type <<
502 if ( pExtDecayer !=0 ) { <<
503 SetProcessSubType(static_cast<int>(DECAY_E <<
504 } <<
505 } <<
506 <<
507 G4VParticleChange* G4Decay::PostStepDoIt( <<
508 const G4Track& aTrack, <<
509 const G4Step& aStep <<
510 ) <<
511 { <<
512 if ( (aTrack.GetTrackStatus() == fStopButAli <<
513 (aTrack.GetTrackStatus() == fStopAndKil <<
514 fParticleChangeForDecay.Initialize(aTrack) <<
515 return &fParticleChangeForDecay; <<
516 } else { <<
517 return DecayIt(aTrack, aStep); <<
518 } <<
519 } <<
520 <<
521 void G4Decay::ProcessDescription(std::ostream& <<
522 { <<
523 outFile << GetProcessName() << ": Decay of p <<
524 << "kinematics of daughters are dertermine <<
525 << " or by PreAssignedDecayProducts\ <<
526 } 405 }
527 406