source: trunk/source/processes/hadronic/models/util/include/G4KineticTrack.hh@ 1196

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17// * *
18// * This code implementation is the result of the scientific and *
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20// * By using, copying, modifying or distributing the software (or *
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23// * acceptance of all terms of the Geant4 Software license. *
24// ********************************************************************
25//
26//
27//
28// $Id: G4KineticTrack.hh,v 1.0 1998/05/20
29// -----------------------------------------------------------------------------
30// GEANT 4 class header file
31//
32// History: first implementation, A. Feliciello, 20th May 1998
33// -----------------------------------------------------------------------------
34
35#ifndef G4KineticTrack_h
36#define G4KineticTrack_h 1
37
38#include "globals.hh"
39#include "G4ios.hh"
40
41
42#include "Randomize.hh"
43#include "G4ThreeVector.hh"
44#include "G4LorentzVector.hh"
45#include "G4VKineticNucleon.hh"
46#include "G4Nucleon.hh"
47#include "G4ParticleDefinition.hh"
48#include "G4VDecayChannel.hh"
49
50// #include "G4Allocator.hh"
51
52class G4KineticTrackVector;
53
54
55
56
57
58class G4KineticTrack : public G4VKineticNucleon
59{
60 public:
61
62 G4KineticTrack();
63
64 G4KineticTrack(const G4KineticTrack& right);
65
66 G4KineticTrack(G4ParticleDefinition* aDefinition,
67 G4double aFormationTime,
68 G4ThreeVector aPosition,
69 G4LorentzVector& a4Momentum);
70 G4KineticTrack(G4Nucleon * nucleon,
71 G4ThreeVector aPosition,
72 G4LorentzVector& a4Momentum);
73
74 ~G4KineticTrack();
75
76 const G4KineticTrack& operator=(const G4KineticTrack& right);
77
78 G4int operator==(const G4KineticTrack& right) const;
79
80 G4int operator!=(const G4KineticTrack& right) const;
81/*
82 inline void *operator new(size_t);
83 inline void operator delete(void *aTrack);
84*/
85 G4ParticleDefinition* GetDefinition() const;
86 void SetDefinition(G4ParticleDefinition* aDefinition);
87
88 G4double GetFormationTime() const;
89 void SetFormationTime(G4double aFormationTime);
90
91 const G4ThreeVector& GetPosition() const;
92 void SetPosition(const G4ThreeVector aPosition);
93
94 const G4LorentzVector& Get4Momentum() const;
95 void Set4Momentum(const G4LorentzVector& a4Momentum);
96 void Update4Momentum(G4double aEnergy); // update E and p, not changing mass
97 void Update4Momentum(const G4ThreeVector & aMomentum); // idem
98 void SetTrackingMomentum(const G4LorentzVector& a4Momentum);
99 void UpdateTrackingMomentum(G4double aEnergy); // update E and p, not changing mass
100 void UpdateTrackingMomentum(const G4ThreeVector & aMomentum); // idem
101
102 const G4LorentzVector& GetTrackingMomentum() const;
103
104 G4double SampleResidualLifetime();
105
106 void Hit();
107 void SetNucleon(G4Nucleon * aN) {theNucleon = aN;}
108
109 G4bool IsParticipant() const;
110
111 G4KineticTrackVector* Decay();
112
113 // LB move to public (before was private) LB
114 G4double* GetActualWidth() const;
115
116 G4double GetActualMass() const;
117 G4int GetnChannels() const;
118
119// position relativ to nucleus "state"
120 enum CascadeState {undefined, outside, going_in, inside,
121 going_out, gone_out, captured, miss_nucleus };
122
123 CascadeState SetState(const CascadeState new_state);
124 CascadeState GetState() const;
125 void SetProjectilePotential(const G4double aPotential);
126 G4double GetProjectilePotential() const;
127
128
129 private:
130
131
132 void SetnChannels(const G4int aChannel);
133
134 void SetActualWidth(G4double* anActualWidth);
135
136 G4double EvaluateTotalActualWidth();
137
138 G4double EvaluateCMMomentum (const G4double mass,
139 const G4double* m_ij) const;
140
141 G4double IntegrateCMMomentum(const G4double lowerLimit) const;
142
143 G4double IntegrateCMMomentum(const G4double lowerLimit ,const G4double polemass) const;
144
145 G4double IntegrateCMMomentum2() const;
146
147 public:
148
149 G4double BrWig(const G4double Gamma,
150 const G4double rmass,
151 const G4double mass) const;
152
153private:
154 G4double IntegrandFunction1 (G4double xmass) const;
155 G4double IntegrandFunction2 (G4double xmass) const;
156 G4double IntegrandFunction3 (G4double xmass) const;
157 G4double IntegrandFunction4 (G4double xmass) const;
158public:
159 // friend G4double IntegrandFunction3 (G4double xmass);
160
161 // friend G4double IntegrandFunction4 (G4double xmass);
162
163 // LB new variable created LB
164 G4int chosench;
165
166
167 private:
168
169 G4ParticleDefinition* theDefinition;
170
171 G4double theFormationTime;
172
173 G4ThreeVector thePosition;
174
175 G4LorentzVector the4Momentum;
176 G4LorentzVector theFermi3Momentum;
177 G4LorentzVector theTotal4Momentum;
178
179 G4Nucleon * theNucleon;
180
181 G4int nChannels;
182
183 G4double theActualMass;
184
185 G4double* theActualWidth;
186
187 // Temporary storage for daughter masses and widths
188 // (needed because Integrand Function cannot take > 1 argument)
189 G4double* theDaughterMass;
190 G4double* theDaughterWidth;
191
192 CascadeState theStateToNucleus;
193
194 G4double theProjectilePotential;
195};
196
197// extern G4Allocator<G4KineticTrack> theKTAllocator;
198
199
200// Class G4KineticTrack
201/*
202inline void * G4KineticTrack::operator new(size_t)
203{
204 void * aT;
205 aT = (void *) theKTAllocator.MallocSingle();
206 return aT;
207}
208
209inline void G4KineticTrack::operator delete(void * aT)
210{
211 theKTAllocator.FreeSingle((G4KineticTrack *) aT);
212}
213*/
214
215inline G4ParticleDefinition* G4KineticTrack::GetDefinition() const
216{
217 return theDefinition;
218}
219
220inline void G4KineticTrack::SetDefinition(G4ParticleDefinition* aDefinition)
221{
222 theDefinition = aDefinition;
223}
224
225
226
227inline G4double G4KineticTrack::GetFormationTime() const
228{
229 return theFormationTime;
230}
231
232inline void G4KineticTrack::SetFormationTime(G4double aFormationTime)
233{
234 theFormationTime = aFormationTime;
235}
236
237
238
239inline const G4ThreeVector& G4KineticTrack::GetPosition() const
240{
241 return thePosition;
242}
243
244inline void G4KineticTrack::SetPosition(const G4ThreeVector aPosition)
245{
246 thePosition = aPosition;
247}
248
249
250inline const G4LorentzVector& G4KineticTrack::Get4Momentum() const
251{
252 return theTotal4Momentum;
253}
254
255inline const G4LorentzVector& G4KineticTrack::GetTrackingMomentum() const
256{
257 return the4Momentum;
258}
259
260inline void G4KineticTrack::Set4Momentum(const G4LorentzVector& a4Momentum)
261{
262// set the4Momentum and update theTotal4Momentum
263
264 theTotal4Momentum=a4Momentum;
265 the4Momentum = theTotal4Momentum;
266 theFermi3Momentum=G4LorentzVector(0);
267}
268
269inline void G4KineticTrack::Update4Momentum(G4double aEnergy)
270{
271// update the4Momentum with aEnergy at constant mass (the4Momentum.mag()
272// updates theTotal4Momentum as well.
273 G4double newP(0);
274 G4double mass2=theTotal4Momentum.mag2();
275 if ( sqr(aEnergy) > mass2 )
276 {
277 newP = std::sqrt(sqr(aEnergy) - mass2 );
278 } else
279 {
280 aEnergy=std::sqrt(mass2);
281 }
282 Set4Momentum(G4LorentzVector(newP*the4Momentum.vect().unit(), aEnergy));
283}
284
285inline void G4KineticTrack::Update4Momentum(const G4ThreeVector & aMomentum)
286{
287// update the4Momentum with aMomentum at constant mass (the4Momentum.mag()
288// updates theTotal4Momentum as well.
289 G4double newE=std::sqrt(theTotal4Momentum.mag2() + aMomentum.mag2());
290 Set4Momentum(G4LorentzVector(aMomentum, newE));
291}
292
293inline void G4KineticTrack::SetTrackingMomentum(const G4LorentzVector& aMomentum)
294{
295// set the4Momentum and update theTotal4Momentum, keep the mass of aMomentum
296
297 the4Momentum = aMomentum;
298 theTotal4Momentum=the4Momentum+theFermi3Momentum;
299// keep mass of aMomentum for the total momentum
300 G4double m2 = aMomentum.mag2();
301 G4double p2=theTotal4Momentum.vect().mag2();
302 theTotal4Momentum.setE(std::sqrt(m2+p2));
303}
304
305inline void G4KineticTrack::UpdateTrackingMomentum(G4double aEnergy)
306{
307// update the4Momentum with aEnergy at constant mass (the4Momentum.mag()
308// updates theTotal4Momentum as well.
309 G4double newP(0);
310 G4double mass2=theTotal4Momentum.mag2();
311 if ( sqr(aEnergy) > mass2 )
312 {
313 newP = std::sqrt(sqr(aEnergy) - mass2 );
314 } else
315 {
316 aEnergy=std::sqrt(mass2);
317 }
318 SetTrackingMomentum(G4LorentzVector(newP*the4Momentum.vect().unit(), aEnergy));
319}
320
321inline void G4KineticTrack::UpdateTrackingMomentum(const G4ThreeVector & aMomentum)
322{
323// update the4Momentum with aMomentum at constant mass (the4Momentum.mag()
324// updates theTotal4Momentum as well.
325 G4double newE=std::sqrt(theTotal4Momentum.mag2() + aMomentum.mag2());
326 SetTrackingMomentum(G4LorentzVector(aMomentum, newE));
327}
328
329
330
331
332inline G4double G4KineticTrack::GetActualMass() const
333{
334 return std::sqrt(std::abs(the4Momentum.mag2()));
335}
336
337
338
339inline G4int G4KineticTrack::GetnChannels() const
340{
341 return nChannels;
342}
343
344inline void G4KineticTrack::SetnChannels(const G4int numberOfChannels)
345{
346 nChannels = numberOfChannels;
347}
348
349
350
351inline G4double* G4KineticTrack::GetActualWidth() const
352{
353 return theActualWidth;
354}
355
356inline void G4KineticTrack::SetActualWidth(G4double* anActualWidth)
357{
358 theActualWidth = anActualWidth;
359}
360
361
362
363inline G4double G4KineticTrack::EvaluateTotalActualWidth()
364{
365 G4int index;
366 G4double theTotalActualWidth = 0.0;
367 for (index = nChannels - 1; index >= 0; index--)
368 {
369 theTotalActualWidth += theActualWidth[index];
370 }
371 return theTotalActualWidth;
372}
373
374
375
376inline G4double G4KineticTrack::SampleResidualLifetime()
377{
378 G4double theTotalActualWidth = this->EvaluateTotalActualWidth();
379 G4double tau = hbar_Planck * (-1.0 / theTotalActualWidth);
380 G4double theResidualLifetime = tau * std::log(G4UniformRand());
381 return theResidualLifetime*the4Momentum.gamma();
382}
383
384
385
386inline G4double G4KineticTrack::EvaluateCMMomentum(const G4double m,
387 const G4double* m_ij) const
388{
389 G4double theCMMomentum;
390 if((m_ij[0]+m_ij[1])<m)
391 theCMMomentum = 1 / (2 * m) *
392 std::sqrt (((m * m) - (m_ij[0] + m_ij[1]) * (m_ij[0] + m_ij[1])) *
393 ((m * m) - (m_ij[0] - m_ij[1]) * (m_ij[0] - m_ij[1])));
394 else
395 theCMMomentum=0.;
396
397 return theCMMomentum;
398}
399
400inline G4double G4KineticTrack::BrWig(const G4double Gamma, const G4double rmass, const G4double mass) const
401{
402 G4double Norm = twopi;
403 return (Gamma/((mass-rmass)*(mass-rmass)+Gamma*Gamma/4.))/Norm;
404}
405
406inline
407void G4KineticTrack::Hit()
408{
409 if(theNucleon)
410 {
411 theNucleon->Hit(1);
412 }
413}
414
415inline
416G4bool G4KineticTrack::IsParticipant() const
417{
418 if(!theNucleon) return true;
419 return theNucleon->AreYouHit();
420}
421
422inline
423G4KineticTrack::CascadeState G4KineticTrack::GetState() const
424{
425 return theStateToNucleus;
426}
427
428inline
429G4KineticTrack::CascadeState G4KineticTrack::SetState(const CascadeState new_state)
430{
431 CascadeState old_state=theStateToNucleus;
432 theStateToNucleus=new_state;
433 return old_state;
434}
435
436inline
437void G4KineticTrack::SetProjectilePotential(G4double aPotential)
438{
439 theProjectilePotential = aPotential;
440}
441inline
442G4double G4KineticTrack::GetProjectilePotential() const
443{
444 return theProjectilePotential;
445}
446
447#endif
448
449
450
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