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26 // 26 //
>> 27 // $Id: G4FissionProbability.cc,v 1.8.4.1 2009/03/03 13:22:52 gcosmo Exp $
>> 28 // GEANT4 tag $Name: geant4-09-02-patch-01 $
27 // 29 //
28 // Hadronic Process: Nuclear De-excitations 30 // Hadronic Process: Nuclear De-excitations
29 // by V. Lara (Oct 1998) 31 // by V. Lara (Oct 1998)
30 // 32 //
31 // 33 //
32 // J.M.Quesada (14 february 2009) bug fixed in << 34 // J.M.Quesada (14 february 2009) bug fixed in fission width: missing parenthesis in the denominator
33 // parenthesis <<
34 35
35 36
36 #include "G4FissionProbability.hh" 37 #include "G4FissionProbability.hh"
37 #include "G4PhysicalConstants.hh" <<
38 #include "G4NuclearLevelData.hh" <<
39 #include "G4PairingCorrection.hh" 38 #include "G4PairingCorrection.hh"
40 #include "G4EvaporationLevelDensityParameter.h << 39
41 #include "G4FissionLevelDensityParameter.hh" << 40
42 #include "G4Exp.hh" << 41
43 << 42 G4FissionProbability::G4FissionProbability(const G4FissionProbability &) : G4VEmissionProbability()
44 G4FissionProbability::G4FissionProbability() : << 43 {
45 G4VEmissionProbability(0, 0), << 44 throw G4HadronicException(__FILE__, __LINE__, "G4FissionProbability::copy_constructor meant to not be accessable");
46 theEvapLDP(new G4EvaporationLevelDensityPara << 45 }
47 theFissLDP(new G4FissionLevelDensityParamete << 46
48 ownEvapLDP(true), << 47
49 ownFissLDP(true) << 48
>> 49
>> 50 const G4FissionProbability & G4FissionProbability::operator=(const G4FissionProbability &)
>> 51 {
>> 52 throw G4HadronicException(__FILE__, __LINE__, "G4FissionProbability::operator= meant to not be accessable");
>> 53 return *this;
>> 54 }
>> 55
>> 56
>> 57 G4bool G4FissionProbability::operator==(const G4FissionProbability &) const
50 { 58 {
51 fPairCorr = G4NuclearLevelData::GetInstance( << 59 return false;
52 } 60 }
53 61
54 G4FissionProbability::~G4FissionProbability() << 62 G4bool G4FissionProbability::operator!=(const G4FissionProbability &) const
55 { 63 {
56 if (ownEvapLDP) delete theEvapLDP; << 64 return true;
57 if (ownFissLDP) delete theFissLDP; <<
58 } 65 }
59 66
60 G4double << 67
61 G4FissionProbability::EmissionProbability(cons << 68 G4double G4FissionProbability::EmissionProbability(const G4Fragment & fragment, const G4double MaximalKineticEnergy)
62 G4double MaximalKineticEnergy) << 69 // Compute integrated probability of fission channel
63 // Compute integrated probability of fission <<
64 { 70 {
65 if (MaximalKineticEnergy <= 0.0) { return 0. << 71 if (MaximalKineticEnergy <= 0.0) return 0.0;
66 G4int A = fragment.GetA_asInt(); << 72 G4double A = fragment.GetA();
67 G4int Z = fragment.GetZ_asInt(); << 73 G4double Z = fragment.GetZ();
68 G4double U = fragment.GetExcitationEnergy(); << 74 G4double U = fragment.GetExcitationEnergy();
69 75
70 G4double Ucompound = U - fPairCorr->GetPairi << 76 G4double Ucompound = U - G4PairingCorrection::GetInstance()->GetPairingCorrection(static_cast<G4int>(A),
71 G4double Ufission = U - fPairCorr->GetFissio << 77 static_cast<G4int>(Z));
72 if(Ucompound < 0.0 || Ufission < 0.0) { retu << 78 G4double Ufission = U - G4PairingCorrection::GetInstance()->GetFissionPairingCorrection(static_cast<G4int>(A),
>> 79 static_cast<G4int>(Z));
73 80
74 G4double SystemEntropy = << 81 G4double SystemEntropy = 2.0*std::sqrt(theEvapLDP.LevelDensityParameter(static_cast<G4int>(A),
75 2.0*std::sqrt(theEvapLDP->LevelDensityPara << 82 static_cast<G4int>(Z),
>> 83 Ucompound)*Ucompound);
76 84
77 G4double afission = theFissLDP->LevelDensity << 85 G4double afission = theFissLDP.LevelDensityParameter(static_cast<G4int>(A),
>> 86 static_cast<G4int>(Z),
>> 87 Ufission);
78 88
79 G4double Cf = 2.0*std::sqrt(afission*Maximal << 89 G4double Cf = 2.0*std::sqrt(afission*MaximalKineticEnergy);
80 G4double Exp1 = (SystemEntropy <= 160.0) ? G << 90
81 G4double Exp2 = (SystemEntropy-Cf <= 160.0) << 91 // G4double Q1 = 1.0 + (Cf - 1.0)*std::exp(Cf);
>> 92 // G4double Q2 = 4.0*pi*afission*std::exp(SystemEntropy);
>> 93
>> 94 // G4double probability = Q1/Q2;
>> 95
>> 96
>> 97 G4double Exp1 = 0.0;
>> 98 if (SystemEntropy <= 160.0) Exp1 = std::exp(-SystemEntropy);
>> 99 // @@@@@@@@@@@@@@@@@ hpw changed max to min - cannot notify vicente now
>> 100 G4double Exp2 = std::exp( std::min(700.0,Cf-SystemEntropy) );
>> 101
>> 102 // JMQ 14/02/09 BUG fixed in fission probability (missing parenthesis at denominator)
>> 103 //AH fix from Vincente: G4double probability = (Exp1 + (1.0-Cf)*Exp2) / 4.0*pi*afission;
>> 104 // G4double probability = (Exp1 + (Cf-1.0)*Exp2) / 4.0*pi*afission;
>> 105 G4double probability = (Exp1 + (Cf-1.0)*Exp2) / (4.0*pi*afission);
82 106
83 // JMQ 14/02/09 BUG fixed in fission probabi <<
84 // at denominator) <<
85 G4double probability = (Exp1 + (Cf-1.0)*Exp2 <<
86 107
87 return probability; << 108
>> 109 return probability;
88 } 110 }
89 111
90 112