Geant4  10.03
G4NeutronRadCapture.cc
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26 // $Id: G4NeutronRadCapture.cc 88191 2015-02-02 17:27:37Z gcosmo $
27 //
28 //
29 // Physics model class G4NeutronRadCapture
30 // Created: 31 August 2009
31 // Author V.Ivanchenko
32 //
33 // Modified:
34 // 09.09.2010 V.Ivanchenko added usage of G4PhotonEvaporation
35 //
36 
37 #include "G4NeutronRadCapture.hh"
38 #include "G4SystemOfUnits.hh"
39 #include "G4ParticleDefinition.hh"
40 #include "G4Fragment.hh"
41 #include "G4FragmentVector.hh"
42 #include "G4NucleiProperties.hh"
43 #include "G4VEvaporationChannel.hh"
44 #include "G4PhotonEvaporation.hh"
45 #include "G4DynamicParticle.hh"
46 #include "G4ParticleTable.hh"
47 #include "G4IonTable.hh"
48 #include "G4Deuteron.hh"
49 #include "G4Triton.hh"
50 #include "G4He3.hh"
51 #include "G4Alpha.hh"
52 
54  : G4HadronicInteraction("nRadCapture"),
55  photonEvaporation(nullptr),lab4mom(0.,0.,0.,0.)
56 {
59  SetMinEnergy( 0.0*CLHEP::GeV );
60  SetMaxEnergy( 100.*CLHEP::TeV );
61 
63 }
64 
66 {
67  delete photonEvaporation;
68 }
69 
71 {
72  if(photonEvaporation != nullptr) { return; }
73  G4DeexPrecoParameters* param =
76 
80 }
81 
83  const G4HadProjectile& aTrack, G4Nucleus& theNucleus)
84 {
87 
88  G4int A = theNucleus.GetA_asInt();
89  G4int Z = theNucleus.GetZ_asInt();
90 
91  G4double time = aTrack.GetGlobalTime();
92 
93  // Create initial state
94  lab4mom.set(0.,0.,0.,G4NucleiProperties::GetNuclearMass(A, Z));
95  lab4mom += aTrack.Get4Momentum();
96 
97  G4double M = lab4mom.mag();
98  ++A;
100  //G4cout << "Capture start: Z= " << Z << " A= " << A
101  // << " LabM= " << M << " Mcompound= " << mass << G4endl;
102 
103  // simplified method of 1 gamma emission
104  if(A <= 4) {
105 
106  G4ThreeVector bst = lab4mom.boostVector();
107 
108  if(M - mass <= lowestEnergyLimit) {
109  return &theParticleChange;
110  }
111 
112  if (verboseLevel > 1) {
113  G4cout << "G4NeutronRadCapture::DoIt: Eini(MeV)="
114  << aTrack.GetKineticEnergy()/MeV << " Eexc(MeV)= "
115  << (M - mass)/MeV
116  << " Z= " << Z << " A= " << A << G4endl;
117  }
118  G4double e1 = (M - mass)*(M + mass)/(2*M);
119 
120  G4double cost = 2.0*G4UniformRand() - 1.0;
121  if(cost > 1.0) {cost = 1.0;}
122  else if(cost < -1.0) {cost = -1.0;}
123  G4double sint = std::sqrt((1. - cost)*(1.0 + cost));
125 
126  G4LorentzVector lv2(e1*sint*std::cos(phi),e1*sint*std::sin(phi),
127  e1*cost,e1);
128  lv2.boost(bst);
129  G4HadSecondary* news =
131  news->SetTime(time);
133  delete news;
134 
135  const G4ParticleDefinition* theDef = 0;
136 
137  lab4mom -= lv2;
138  if (Z == 1 && A == 2) {theDef = G4Deuteron::Deuteron();}
139  else if (Z == 1 && A == 3) {theDef = G4Triton::Triton();}
140  else if (Z == 2 && A == 3) {theDef = G4He3::He3();}
141  else if (Z == 2 && A == 4) {theDef = G4Alpha::Alpha();}
142  else { theDef = theTableOfIons->GetIon(Z,A,0.0,noFloat,0); }
143 
144  if (verboseLevel > 1) {
145  G4cout << "Gamma 4-mom: " << lv2 << " "
146  << theDef->GetParticleName() << " " << lab4mom << G4endl;
147  }
148  if(theDef) {
149  news = new G4HadSecondary(new G4DynamicParticle(theDef, lab4mom));
150  news->SetTime(time);
152  delete news;
153  }
154 
155  // Use photon evaporation
156  } else {
157 
158  // protection against wrong kinematic
159  if(M < mass) {
160  G4double etot = std::max(mass, lab4mom.e());
161  G4double ptot = std::sqrt((etot - mass)*(etot + mass));
162  G4ThreeVector v = lab4mom.vect().unit();
163  lab4mom.set(v.x()*ptot,v.y()*ptot,v.z()*ptot,etot);
164  }
165 
166  G4Fragment* aFragment = new G4Fragment(A, Z, lab4mom);
167 
168  if (verboseLevel > 1) {
169  G4cout << "G4NeutronRadCapture::ApplyYourself initial G4Fragmet:"
170  << G4endl;
171  G4cout << aFragment << G4endl;
172  }
173 
174  //
175  // Sample final state
176  //
178  if(!fv) { fv = new G4FragmentVector(); }
179  fv->push_back(aFragment);
180  size_t n = fv->size();
181 
182  if (verboseLevel > 1) {
183  G4cout << "G4NeutronRadCapture: " << n << " final particle" << G4endl;
184  }
185  for(size_t i=0; i<n; ++i) {
186 
187  G4Fragment* f = (*fv)[i];
188  G4double etot = f->GetMomentum().e();
189 
190  Z = f->GetZ_asInt();
191  A = f->GetA_asInt();
192 
193  const G4ParticleDefinition* theDef;
194  if(0 == Z && 0 == A) {theDef = f->GetParticleDefinition();}
195  else if (Z == 1 && A == 2) {theDef = G4Deuteron::Deuteron();}
196  else if (Z == 1 && A == 3) {theDef = G4Triton::Triton();}
197  else if (Z == 2 && A == 3) {theDef = G4He3::He3();}
198  else if (Z == 2 && A == 4) {theDef = G4Alpha::Alpha();}
199  else {
200  G4double eexc = f->GetExcitationEnergy();
201  if(eexc <= minExcitation) { eexc = 0.0; }
202  theDef = theTableOfIons->GetIon(Z, A, eexc, noFloat, 0);
203  /*
204  G4cout << "### NC Find ion Z= " << Z << " A= " << A
205  << " Eexc(MeV)= " << eexc/MeV << " "
206  << theDef << G4endl;
207  */
208  }
209  G4double ekin = std::max(0.0,etot - theDef->GetPDGMass());
210  if (verboseLevel > 1) {
211  G4cout << i << ". " << theDef->GetParticleName()
212  << " Ekin(MeV)= " << etot/MeV
213  << " p: " << f->GetMomentum().vect()
214  << G4endl;
215  }
216  G4HadSecondary* news = new G4HadSecondary(
217  new G4DynamicParticle(theDef,
218  f->GetMomentum().vect().unit(),
219  ekin));
220  G4double timeF = f->GetCreationTime();
221  if(timeF < 0.0) { timeF = 0.0; }
222  news->SetTime(time + timeF);
224  delete news;
225  delete f;
226  }
227  delete fv;
228  }
229  //G4cout << "Capture done" << G4endl;
230  return &theParticleChange;
231 }
232 
G4int GetA_asInt() const
Definition: G4Nucleus.hh:109
static G4double GetNuclearMass(const G4double A, const G4double Z)
G4FragmentVector * BreakUpFragment(G4Fragment *theNucleus)
CLHEP::Hep3Vector G4ThreeVector
G4ParticleDefinition * GetIon(G4int Z, G4int A, G4int lvl=0)
Definition: G4IonTable.cc:503
const G4ParticleDefinition * GetParticleDefinition() const
Definition: G4Fragment.hh:410
virtual void InitialiseModel() final
virtual void SetICM(G4bool)
int G4int
Definition: G4Types.hh:78
const G4String & GetParticleName() const
G4VEvaporationChannel * photonEvaporation
static constexpr double twopi
Definition: G4SIunits.hh:76
void SetStatusChange(G4HadFinalStateStatus aS)
static constexpr double TeV
Definition: G4SIunits.hh:218
void SetMinEnergy(G4double anEnergy)
G4IonTable * GetIonTable() const
#define G4UniformRand()
Definition: Randomize.hh:97
G4GLOB_DLL std::ostream G4cout
double A(double temperature)
G4int GetA_asInt() const
Definition: G4Fragment.hh:256
G4double GetCreationTime() const
Definition: G4Fragment.hh:420
const G4LorentzVector & GetMomentum() const
Definition: G4Fragment.hh:289
G4double GetKineticEnergy() const
G4double GetGlobalTime() const
std::vector< G4Fragment * > G4FragmentVector
Definition: G4Fragment.hh:63
G4DeexPrecoParameters * GetParameters()
static G4Triton * Triton()
Definition: G4Triton.cc:95
static constexpr double eV
Definition: G4SIunits.hh:215
const G4int n
static G4Gamma * Gamma()
Definition: G4Gamma.cc:86
const G4LorentzVector & Get4Momentum() const
static G4Deuteron * Deuteron()
Definition: G4Deuteron.cc:94
void SetTime(G4double aT)
G4double GetPDGMass() const
static G4ParticleTable * GetParticleTable()
T max(const T t1, const T t2)
brief Return the largest of the two arguments
virtual G4HadFinalState * ApplyYourself(const G4HadProjectile &aTrack, G4Nucleus &targetNucleus) final
G4int GetZ_asInt() const
Definition: G4Nucleus.hh:115
static constexpr double GeV
Definition: G4SIunits.hh:217
G4int GetZ_asInt() const
Definition: G4Fragment.hh:261
void SetMaxEnergy(const G4double anEnergy)
#define G4endl
Definition: G4ios.hh:61
static constexpr double MeV
Definition: G4SIunits.hh:214
static G4Alpha * Alpha()
Definition: G4Alpha.cc:89
void AddSecondary(G4DynamicParticle *aP, G4int mod=-1)
double G4double
Definition: G4Types.hh:76
static G4He3 * He3()
Definition: G4He3.cc:94
static constexpr double keV
Definition: G4SIunits.hh:216
static G4NuclearLevelData * GetInstance()
G4double GetMinExcitation() const
#define noFloat
Definition: G4Ions.hh:118
G4double GetExcitationEnergy() const
Definition: G4Fragment.hh:273
CLHEP::HepLorentzVector G4LorentzVector