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25 // 22 //
26 // 23 //
>> 24 // $Id: G4Decay.cc,v 1.21 2005/11/21 18:06:07 asaim Exp $
>> 25 // GEANT4 tag $Name: geant4-08-00 $
27 // 26 //
28 // 27 //
29 // ------------------------------------------- 28 // --------------------------------------------------------------
30 // GEANT 4 class implementation file 29 // GEANT 4 class implementation file
31 // 30 //
32 // History: first implementation, based o 31 // History: first implementation, based on object model of
33 // 2nd December 1995, G.Cosmo 32 // 2nd December 1995, G.Cosmo
34 // 7 July 1996 H.Kurashige 33 // 7 July 1996 H.Kurashige
35 // ------------------------------------------- 34 // ------------------------------------------------------------
36 // remove BuildPhysicsTable() 28 Nov. 1997 35 // remove BuildPhysicsTable() 28 Nov. 1997 H.Kurashige
37 // change DBL_EPSIRON to DBL_MIN 14 Dec. 19 36 // change DBL_EPSIRON to DBL_MIN 14 Dec. 1997 H.Kurashige
38 // modified for new ParticleChange 12 Mar. 1 37 // modified for new ParticleChange 12 Mar. 1998 H.Kurashige
39 // modified for "GoodForTrackingFlag" 19 Jun 38 // modified for "GoodForTrackingFlag" 19 June 1998 H.Kurashige
40 // rename thePhysicsTable to aPhyscisTable 2 39 // rename thePhysicsTable to aPhyscisTable 2 Aug. 1998 H.Kurashige
41 // modified IsApplicable in order to protect 40 // modified IsApplicable in order to protect the decay from registered
42 // to resonances 12 Dec. 1998 H.Kurashi 41 // to resonances 12 Dec. 1998 H.Kurashige
43 // remove G4ParticleMomentum 6 Feb. 99 H.Ku 42 // remove G4ParticleMomentum 6 Feb. 99 H.Kurashige
44 // modified IsApplicable to activate G4Deca 43 // modified IsApplicable to activate G4Decay for resonances 1 Mar. 00 H.Kurashige
45 // Add External Decayer 23 Feb. 2001 44 // Add External Decayer 23 Feb. 2001 H.Kurashige
46 // change LowestBinValue,HighestBinValue and 45 // change LowestBinValue,HighestBinValue and TotBin(200) 9 Feb. 2002
47 // 46 //
48 47
49 #include "G4Decay.hh" 48 #include "G4Decay.hh"
50 <<
51 #include "G4PhysicalConstants.hh" <<
52 #include "G4SystemOfUnits.hh" <<
53 #include "G4DynamicParticle.hh" 49 #include "G4DynamicParticle.hh"
54 #include "G4DecayProducts.hh" 50 #include "G4DecayProducts.hh"
55 #include "G4DecayTable.hh" 51 #include "G4DecayTable.hh"
56 #include "G4VDecayChannel.hh" <<
57 #include "G4PhysicsLogVector.hh" 52 #include "G4PhysicsLogVector.hh"
58 #include "G4ParticleChangeForDecay.hh" 53 #include "G4ParticleChangeForDecay.hh"
59 #include "G4VExtDecayer.hh" 54 #include "G4VExtDecayer.hh"
60 55
61 // constructor 56 // constructor
62 G4Decay::G4Decay(const G4String& processName) 57 G4Decay::G4Decay(const G4String& processName)
63 :G4VRestDiscret 58 :G4VRestDiscreteProcess(processName, fDecay),
64 verboseLevel(1), 59 verboseLevel(1),
65 HighestValue(2 60 HighestValue(20.0),
66 fRemainderLifeTime(-1.0), << 61 pExtDecayer(0)
67 pExtDecayer(nu <<
68 { 62 {
69 // set Process Sub Type <<
70 SetProcessSubType(static_cast<int>(DECAY)); <<
71 <<
72 #ifdef G4VERBOSE 63 #ifdef G4VERBOSE
73 if (GetVerboseLevel()>1) { 64 if (GetVerboseLevel()>1) {
74 G4cout << "G4Decay constructor " << " Na << 65 G4cerr << "G4Decay constructor " << " Name:" << processName << G4endl;
75 } 66 }
76 #endif 67 #endif
77 <<
78 pParticleChange = &fParticleChangeForDecay; 68 pParticleChange = &fParticleChangeForDecay;
79 } 69 }
80 70
81 G4Decay::~G4Decay() 71 G4Decay::~G4Decay()
82 { 72 {
83 if (pExtDecayer != nullptr) { << 73 if (pExtDecayer) {
84 delete pExtDecayer; 74 delete pExtDecayer;
85 } 75 }
86 } 76 }
87 77
88 G4bool G4Decay::IsApplicable(const G4ParticleD 78 G4bool G4Decay::IsApplicable(const G4ParticleDefinition& aParticleType)
89 { 79 {
90 // check if the particle is stable? 80 // check if the particle is stable?
91 if (aParticleType.GetPDGLifeTime() <0.0) { 81 if (aParticleType.GetPDGLifeTime() <0.0) {
92 return false; 82 return false;
93 } else if (aParticleType.GetPDGMass() <= 0. 83 } else if (aParticleType.GetPDGMass() <= 0.0*MeV) {
94 return false; 84 return false;
95 } else { 85 } else {
96 return true; 86 return true;
97 } 87 }
98 } 88 }
99 89
100 G4double G4Decay::GetMeanLifeTime(const G4Trac 90 G4double G4Decay::GetMeanLifeTime(const G4Track& aTrack ,
101 G4ForceCondi 91 G4ForceCondition*)
102 { 92 {
103 // returns the mean free path in GEANT4 int 93 // returns the mean free path in GEANT4 internal units
104 G4double meanlife; 94 G4double meanlife;
105 95
106 // get particle 96 // get particle
107 const G4DynamicParticle* aParticle = aTrack 97 const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
108 const G4ParticleDefinition* aParticleDef = << 98 G4ParticleDefinition* aParticleDef = aParticle->GetDefinition();
109 G4double aLife = aParticleDef->GetPDGLifeTi 99 G4double aLife = aParticleDef->GetPDGLifeTime();
110 100
111 // check if the particle is stable? 101 // check if the particle is stable?
112 if (aParticleDef->GetPDGStable()) { 102 if (aParticleDef->GetPDGStable()) {
113 //1000000 times the life time of the unive << 103 meanlife = DBL_MAX;
114 meanlife = 1e24 * s; <<
115 104
116 } else { 105 } else {
117 meanlife = aLife; 106 meanlife = aLife;
118 } 107 }
119 108
120 #ifdef G4VERBOSE 109 #ifdef G4VERBOSE
121 if (GetVerboseLevel()>1) { 110 if (GetVerboseLevel()>1) {
122 G4cout << "mean life time: "<< meanlife/n 111 G4cout << "mean life time: "<< meanlife/ns << "[ns]" << G4endl;
123 } 112 }
124 #endif 113 #endif
125 114
126 return meanlife; 115 return meanlife;
127 } 116 }
128 117
129 G4double G4Decay::GetMeanFreePath(const G4Trac 118 G4double G4Decay::GetMeanFreePath(const G4Track& aTrack,G4double, G4ForceCondition*)
130 { 119 {
131 // get particle 120 // get particle
132 const G4DynamicParticle* aParticle = aTrack 121 const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
133 const G4ParticleDefinition* aParticleDef = << 122 G4ParticleDefinition* aParticleDef = aParticle->GetDefinition();
134 G4double aMass = aParticle->GetMass(); 123 G4double aMass = aParticle->GetMass();
135 G4double aLife = aParticleDef->GetPDGLifeTi 124 G4double aLife = aParticleDef->GetPDGLifeTime();
136 125
137 126
138 // returns the mean free path in GEANT4 in 127 // returns the mean free path in GEANT4 internal units
139 G4double pathlength; 128 G4double pathlength;
140 G4double aCtau = c_light * aLife; 129 G4double aCtau = c_light * aLife;
141 130
142 // check if the particle is stable? 131 // check if the particle is stable?
143 if (aParticleDef->GetPDGStable()) { 132 if (aParticleDef->GetPDGStable()) {
144 pathlength = DBL_MAX; 133 pathlength = DBL_MAX;
145 134
146 //check if the particle has very short life 135 //check if the particle has very short life time ?
147 } else if (aCtau < DBL_MIN) { 136 } else if (aCtau < DBL_MIN) {
148 pathlength = DBL_MIN; 137 pathlength = DBL_MIN;
149 138
150 } else { 139 } else {
151 //calculate the mean free path 140 //calculate the mean free path
152 // by using normalized kinetic energy (= E 141 // by using normalized kinetic energy (= Ekin/mass)
153 G4double rKineticEnergy = aParticle->Ge 142 G4double rKineticEnergy = aParticle->GetKineticEnergy()/aMass;
154 if ( rKineticEnergy > HighestValue) { 143 if ( rKineticEnergy > HighestValue) {
155 // gamma >> 1 144 // gamma >> 1
156 pathlength = ( rKineticEnergy + 1.0)* a 145 pathlength = ( rKineticEnergy + 1.0)* aCtau;
157 } else if ( rKineticEnergy < DBL_MIN ) { 146 } else if ( rKineticEnergy < DBL_MIN ) {
158 // too slow particle 147 // too slow particle
159 #ifdef G4VERBOSE 148 #ifdef G4VERBOSE
160 if (GetVerboseLevel()>1) { 149 if (GetVerboseLevel()>1) {
161 G4cout << "G4Decay::GetMeanFreePath() !!p << 150 G4cerr << "G4Decay::GetMeanFreePath() !!particle stops!!";
162 G4cout << aParticleDef->GetParticleNa << 151 G4cerr << aParticleDef->GetParticleName() << G4endl;
163 G4cout << "KineticEnergy:" << aParticle->Ge << 152 G4cerr << "KineticEnergy:" << aParticle->GetKineticEnergy()/GeV <<"[GeV]";
164 } 153 }
165 #endif 154 #endif
166 pathlength = DBL_MIN; 155 pathlength = DBL_MIN;
167 } else { 156 } else {
168 // beta <1 157 // beta <1
169 pathlength = (aParticle->GetTotalMoment 158 pathlength = (aParticle->GetTotalMomentum())/aMass*aCtau ;
170 } 159 }
171 } 160 }
172 return pathlength; 161 return pathlength;
173 } 162 }
174 163
175 void G4Decay::BuildPhysicsTable(const G4Partic 164 void G4Decay::BuildPhysicsTable(const G4ParticleDefinition&)
176 { 165 {
177 return; 166 return;
178 } 167 }
179 168
180 G4VParticleChange* G4Decay::DecayIt(const G4Tr 169 G4VParticleChange* G4Decay::DecayIt(const G4Track& aTrack, const G4Step& )
181 { 170 {
182 // The DecayIt() method returns by pointer a 171 // The DecayIt() method returns by pointer a particle-change object.
183 // Units are expressed in GEANT4 internal un 172 // Units are expressed in GEANT4 internal units.
184 173
185 // Initialize ParticleChange 174 // Initialize ParticleChange
186 // all members of G4VParticleChange are 175 // all members of G4VParticleChange are set to equal to
187 // corresponding member in G4Track 176 // corresponding member in G4Track
188 fParticleChangeForDecay.Initialize(aTrack); 177 fParticleChangeForDecay.Initialize(aTrack);
189 178
190 // get particle 179 // get particle
191 const G4DynamicParticle* aParticle = aTrack. 180 const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
192 const G4ParticleDefinition* aParticleDef = a << 181 G4ParticleDefinition* aParticleDef = aParticle->GetDefinition();
193 182
194 // check if the particle is stable 183 // check if the particle is stable
195 if (aParticleDef->GetPDGStable()) return &fP 184 if (aParticleDef->GetPDGStable()) return &fParticleChangeForDecay ;
196 185
197 186
198 //check if thePreAssignedDecayProducts exist 187 //check if thePreAssignedDecayProducts exists
199 const G4DecayProducts* o_products = (aPartic 188 const G4DecayProducts* o_products = (aParticle->GetPreAssignedDecayProducts());
200 G4bool isPreAssigned = (o_products != nullpt << 189 G4bool isPreAssigned = (o_products != 0);
201 G4DecayProducts* products = nullptr; << 190 G4DecayProducts* products = 0;
202 191
203 // decay table 192 // decay table
204 G4DecayTable *decaytable = aParticleDef->G 193 G4DecayTable *decaytable = aParticleDef->GetDecayTable();
205 194
206 // check if external decayer exists 195 // check if external decayer exists
207 G4bool isExtDecayer = (decaytable == nullptr << 196 G4bool isExtDecayer = (decaytable == 0) && (pExtDecayer !=0);
208 197
209 // Error due to NO Decay Table 198 // Error due to NO Decay Table
210 if ( (decaytable == nullptr) && !isExtDecaye << 199 if ( (decaytable == 0) && !isExtDecayer &&!isPreAssigned ){
>> 200 #ifdef G4VERBOSE
211 if (GetVerboseLevel()>0) { 201 if (GetVerboseLevel()>0) {
212 G4cout << "G4Decay::DoIt : decay table << 202 G4cerr << "G4Decay::DoIt : decay table not defined for ";
213 G4cout << aParticle->GetDefinition()->Ge << 203 G4cerr << aParticle->GetDefinition()->GetParticleName()<< G4endl;
214 } 204 }
215 G4ExceptionDescription ed; << 205 #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 206 fParticleChangeForDecay.SetNumberOfSecondaries(0);
225 // Kill the parent particle 207 // Kill the parent particle
226 fParticleChangeForDecay.ProposeTrackStatus 208 fParticleChangeForDecay.ProposeTrackStatus( fStopAndKill ) ;
227 fParticleChangeForDecay.ProposeLocalEnergy 209 fParticleChangeForDecay.ProposeLocalEnergyDeposit(0.0);
228 210
229 ClearNumberOfInteractionLengthLeft(); 211 ClearNumberOfInteractionLengthLeft();
230 return &fParticleChangeForDecay ; 212 return &fParticleChangeForDecay ;
231 } 213 }
232 214
233 if (isPreAssigned) { 215 if (isPreAssigned) {
234 // copy decay products 216 // copy decay products
235 products = new G4DecayProducts(*o_products 217 products = new G4DecayProducts(*o_products);
236 } else if ( isExtDecayer ) { 218 } else if ( isExtDecayer ) {
237 // decay according to external decayer 219 // decay according to external decayer
238 products = pExtDecayer->ImportDecayProduct 220 products = pExtDecayer->ImportDecayProducts(aTrack);
239 } else { 221 } else {
240 // Decay according to decay table. << 222 // decay acoording to decay table
241 // Keep trying to choose a candidate decay << 223 // choose a decay channel
242 // of the decaying particle is below the s << 224 G4VDecayChannel *decaychannel = decaytable->SelectADecayChannel();
243 // candidate daughter particles. << 225 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 226 // decay channel not found
258 G4ExceptionDescription ed; << 227 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 { 228 } else {
285 // execute DecayIt() 229 // execute DecayIt()
286 #ifdef G4VERBOSE 230 #ifdef G4VERBOSE
287 G4int temp = decaychannel->GetVerboseLev 231 G4int temp = decaychannel->GetVerboseLevel();
288 if (GetVerboseLevel()>1) { 232 if (GetVerboseLevel()>1) {
289 G4cout << "G4Decay::DoIt : selected decay c << 233 G4cerr << "G4Decay::DoIt : selected decay channel addr:" << decaychannel <<G4endl;
290 << decaychannel <<G4endl; <<
291 decaychannel->SetVerboseLevel(GetVerboseLeve 234 decaychannel->SetVerboseLevel(GetVerboseLevel());
292 } 235 }
293 #endif 236 #endif
294 products = decaychannel->DecayIt(aPartic 237 products = decaychannel->DecayIt(aParticle->GetMass());
295 #ifdef G4VERBOSE 238 #ifdef G4VERBOSE
296 if (GetVerboseLevel()>1) { 239 if (GetVerboseLevel()>1) {
297 decaychannel->SetVerboseLevel(temp); 240 decaychannel->SetVerboseLevel(temp);
298 } 241 }
299 #endif 242 #endif
300 #ifdef G4VERBOSE 243 #ifdef G4VERBOSE
301 if (GetVerboseLevel()>2) { << 244 // for debug
302 if (! products->IsChecked() ) products->Dump << 245 //if (! products->IsChecked() ) products->DumpInfo();
303 } <<
304 #endif 246 #endif
305 } 247 }
306 } 248 }
307 249
308 // get parent particle information ......... 250 // get parent particle information ...................................
309 G4double ParentEnergy = aParticle->GetTot 251 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 252 G4ThreeVector ParentDirection(aParticle->GetMomentumDirection());
323 253
324 //boost all decay products to laboratory fra 254 //boost all decay products to laboratory frame
325 G4double energyDeposit = 0.0; 255 G4double energyDeposit = 0.0;
326 G4double finalGlobalTime = aTrack.GetGlobalT 256 G4double finalGlobalTime = aTrack.GetGlobalTime();
327 G4double finalLocalTime = aTrack.GetLocalTim <<
328 if (aTrack.GetTrackStatus() == fStopButAlive 257 if (aTrack.GetTrackStatus() == fStopButAlive ){
329 // AtRest case 258 // AtRest case
330 finalGlobalTime += fRemainderLifeTime; 259 finalGlobalTime += fRemainderLifeTime;
331 finalLocalTime += fRemainderLifeTime; <<
332 energyDeposit += aParticle->GetKineticEner 260 energyDeposit += aParticle->GetKineticEnergy();
333 if (isPreAssigned) products->Boost( Parent 261 if (isPreAssigned) products->Boost( ParentEnergy, ParentDirection);
334 } else { 262 } else {
335 // PostStep case 263 // PostStep case
336 if (!isExtDecayer) products->Boost( Parent 264 if (!isExtDecayer) products->Boost( ParentEnergy, ParentDirection);
337 } 265 }
338 // set polarization for daughter particles <<
339 DaughterPolarization(aTrack, products); <<
340 <<
341 266
342 //add products in fParticleChangeForDecay 267 //add products in fParticleChangeForDecay
343 G4int numberOfSecondaries = products->entrie 268 G4int numberOfSecondaries = products->entries();
344 fParticleChangeForDecay.SetNumberOfSecondari 269 fParticleChangeForDecay.SetNumberOfSecondaries(numberOfSecondaries);
345 #ifdef G4VERBOSE 270 #ifdef G4VERBOSE
346 if (GetVerboseLevel()>1) { 271 if (GetVerboseLevel()>1) {
347 G4cout << "G4Decay::DoIt : Decay vertex : << 272 G4cerr << "G4Decay::DoIt : Decay vertex :";
348 G4cout << " Time: " << finalGlobalTime/ns << 273 G4cerr << " Time: " << finalGlobalTime/ns << "[ns]";
349 G4cout << " X:" << (aTrack.GetPosition()). << 274 G4cerr << " X:" << (aTrack.GetPosition()).x() /cm << "[cm]";
350 G4cout << " Y:" << (aTrack.GetPosition()). << 275 G4cerr << " Y:" << (aTrack.GetPosition()).y() /cm << "[cm]";
351 G4cout << " Z:" << (aTrack.GetPosition()). << 276 G4cerr << " Z:" << (aTrack.GetPosition()).z() /cm << "[cm]";
352 G4cout << G4endl; << 277 G4cerr << G4endl;
353 G4cout << "G4Decay::DoIt : decay products << 278 G4cerr << "G4Decay::DoIt : decay products in Lab. Frame" << G4endl;
354 products->DumpInfo(); 279 products->DumpInfo();
355 } 280 }
356 #endif 281 #endif
357 G4int index; 282 G4int index;
358 G4ThreeVector currentPosition; 283 G4ThreeVector currentPosition;
359 const G4TouchableHandle thand = aTrack.GetTo 284 const G4TouchableHandle thand = aTrack.GetTouchableHandle();
360 for (index=0; index < numberOfSecondaries; i << 285 for (index=0; index < numberOfSecondaries; index++)
361 // get current position of the track << 286 {
362 currentPosition = aTrack.GetPosition(); << 287 // get current position of the track
363 // create a new track object << 288 currentPosition = aTrack.GetPosition();
364 G4Track* secondary = new G4Track( products << 289 // create a new track object
>> 290 G4Track* secondary = new G4Track( products->PopProducts(),
365 finalGlobalTime , 291 finalGlobalTime ,
366 currentPosition ); 292 currentPosition );
367 // switch on good for tracking flag << 293 // switch on good for tracking flag
368 secondary->SetGoodForTrackingFlag(); << 294 secondary->SetGoodForTrackingFlag();
369 secondary->SetTouchableHandle(thand); << 295 secondary->SetTouchableHandle(thand);
370 // add the secondary track in the List << 296 // add the secondary track in the List
371 fParticleChangeForDecay.AddSecondary(secon << 297 fParticleChangeForDecay.AddSecondary(secondary);
372 } 298 }
373 delete products; 299 delete products;
374 << 300
375 // Kill the parent particle 301 // Kill the parent particle
376 fParticleChangeForDecay.ProposeTrackStatus( 302 fParticleChangeForDecay.ProposeTrackStatus( fStopAndKill ) ;
377 fParticleChangeForDecay.ProposeLocalEnergyDe 303 fParticleChangeForDecay.ProposeLocalEnergyDeposit(energyDeposit);
378 fParticleChangeForDecay.ProposeLocalTime( fi << 304 fParticleChangeForDecay.ProposeGlobalTime( finalGlobalTime );
379 <<
380 // Clear NumberOfInteractionLengthLeft 305 // Clear NumberOfInteractionLengthLeft
381 ClearNumberOfInteractionLengthLeft(); 306 ClearNumberOfInteractionLengthLeft();
382 << 307
383 return &fParticleChangeForDecay ; 308 return &fParticleChangeForDecay ;
384 } 309 }
385 310
386 void G4Decay::DaughterPolarization(const G4Tra <<
387 { <<
388 // empty implementation <<
389 } <<
390 <<
391 <<
392 311
393 void G4Decay::StartTracking(G4Track*) 312 void G4Decay::StartTracking(G4Track*)
394 { 313 {
395 currentInteractionLength = -1.0; 314 currentInteractionLength = -1.0;
396 ResetNumberOfInteractionLengthLeft(); 315 ResetNumberOfInteractionLengthLeft();
397 316
398 fRemainderLifeTime = -1.0; 317 fRemainderLifeTime = -1.0;
399 } 318 }
400 319
401 void G4Decay::EndTracking() 320 void G4Decay::EndTracking()
402 { 321 {
403 // Clear NumberOfInteractionLengthLeft 322 // Clear NumberOfInteractionLengthLeft
404 ClearNumberOfInteractionLengthLeft(); 323 ClearNumberOfInteractionLengthLeft();
405 324
406 currentInteractionLength = -1.0; 325 currentInteractionLength = -1.0;
407 } 326 }
408 327
409 328
410 G4double G4Decay::PostStepGetPhysicalInteracti 329 G4double G4Decay::PostStepGetPhysicalInteractionLength(
411 const G4Track& tr 330 const G4Track& track,
412 G4double previo 331 G4double previousStepSize,
413 G4ForceCondition* 332 G4ForceCondition* condition
414 ) 333 )
415 { 334 {
>> 335
416 // condition is set to "Not Forced" 336 // condition is set to "Not Forced"
417 *condition = NotForced; 337 *condition = NotForced;
418 338
419 // pre-assigned Decay time 339 // pre-assigned Decay time
420 G4double pTime = track.GetDynamicParticle()- 340 G4double pTime = track.GetDynamicParticle()->GetPreAssignedDecayProperTime();
421 G4double aLife = track.GetDynamicParticle()- 341 G4double aLife = track.GetDynamicParticle()->GetDefinition()->GetPDGLifeTime();
422 342
423 if (pTime < 0.) { 343 if (pTime < 0.) {
424 // normal case 344 // normal case
425 if ( previousStepSize > 0.0){ 345 if ( previousStepSize > 0.0){
426 // subtract NumberOfInteractionLengthLef 346 // subtract NumberOfInteractionLengthLeft
427 SubtractNumberOfInteractionLengthLeft(pr 347 SubtractNumberOfInteractionLengthLeft(previousStepSize);
428 if(theNumberOfInteractionLengthLeft<0.){ 348 if(theNumberOfInteractionLengthLeft<0.){
429 theNumberOfInteractionLengthLeft=perMillion; 349 theNumberOfInteractionLengthLeft=perMillion;
430 } 350 }
431 fRemainderLifeTime = theNumberOfInteract 351 fRemainderLifeTime = theNumberOfInteractionLengthLeft*aLife;
432 } 352 }
433 // get mean free path 353 // get mean free path
434 currentInteractionLength = GetMeanFreePath 354 currentInteractionLength = GetMeanFreePath(track, previousStepSize, condition);
435 355
436 #ifdef G4VERBOSE 356 #ifdef G4VERBOSE
437 if ((currentInteractionLength <=0.0) || (v 357 if ((currentInteractionLength <=0.0) || (verboseLevel>2)){
438 G4cout << "G4Decay::PostStepGetPhysicalI 358 G4cout << "G4Decay::PostStepGetPhysicalInteractionLength " << G4endl;
439 track.GetDynamicParticle()->DumpInfo(); 359 track.GetDynamicParticle()->DumpInfo();
440 G4cout << " in Material " << track.GetM 360 G4cout << " in Material " << track.GetMaterial()->GetName() <<G4endl;
441 G4cout << "MeanFreePath = " << currentIn 361 G4cout << "MeanFreePath = " << currentInteractionLength/cm << "[cm]" <<G4endl;
442 } 362 }
443 #endif 363 #endif
444 364
445 G4double value; 365 G4double value;
446 if (currentInteractionLength <DBL_MAX) { 366 if (currentInteractionLength <DBL_MAX) {
447 value = theNumberOfInteractionLengthLeft 367 value = theNumberOfInteractionLengthLeft * currentInteractionLength;
448 //fRemainderLifeTime = theNumberOfIntera <<
449 } else { 368 } else {
450 value = DBL_MAX; 369 value = DBL_MAX;
451 } 370 }
452 371
453 return value; 372 return value;
454 373
455 } else { 374 } else {
456 //pre-assigned Decay time case 375 //pre-assigned Decay time case
457 // reminder proper time 376 // reminder proper time
458 fRemainderLifeTime = pTime - track.GetProp 377 fRemainderLifeTime = pTime - track.GetProperTime();
459 if (fRemainderLifeTime <= 0.0) fRemainderL << 378 if (fRemainderLifeTime <= 0.0) fRemainderLifeTime = DBL_MIN;
460 << 379
461 G4double rvalue=0.0; <<
462 // use pre-assigned Decay time to determin 380 // use pre-assigned Decay time to determine PIL
463 if (aLife>0.0) { << 381 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 } 382 }
475 } 383 }
476 384
477 G4double G4Decay::AtRestGetPhysicalInteraction 385 G4double G4Decay::AtRestGetPhysicalInteractionLength(
478 const G4Track& tr 386 const G4Track& track,
479 G4ForceCondition* 387 G4ForceCondition* condition
480 ) 388 )
481 { 389 {
482 // condition is set to "Not Forced" 390 // condition is set to "Not Forced"
483 *condition = NotForced; 391 *condition = NotForced;
484 392
485 G4double pTime = track.GetDynamicParticle()- 393 G4double pTime = track.GetDynamicParticle()->GetPreAssignedDecayProperTime();
486 if (pTime >= 0.) { 394 if (pTime >= 0.) {
487 fRemainderLifeTime = pTime - track.GetProp 395 fRemainderLifeTime = pTime - track.GetProperTime();
488 if (fRemainderLifeTime <= 0.0) fRemainderL 396 if (fRemainderLifeTime <= 0.0) fRemainderLifeTime = DBL_MIN;
489 } else { 397 } else {
490 fRemainderLifeTime = 398 fRemainderLifeTime =
491 theNumberOfInteractionLengthLeft * GetMe 399 theNumberOfInteractionLengthLeft * GetMeanLifeTime(track, condition);
492 } 400 }
493 return fRemainderLifeTime; 401 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 } 402 }
527 403