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>> 27 // $Id: G4FissionProbability.cc 105799 2017-08-21 07:35:55Z gcosmo $
27 // 28 //
28 // Hadronic Process: Nuclear De-excitations 29 // Hadronic Process: Nuclear De-excitations
29 // by V. Lara (Oct 1998) 30 // by V. Lara (Oct 1998)
30 // 31 //
31 // 32 //
32 // J.M.Quesada (14 february 2009) bug fixed in 33 // J.M.Quesada (14 february 2009) bug fixed in fission width: missing
33 // parenthesis 34 // parenthesis in the denominator
34 35
35 36
36 #include "G4FissionProbability.hh" 37 #include "G4FissionProbability.hh"
37 #include "G4PhysicalConstants.hh" 38 #include "G4PhysicalConstants.hh"
38 #include "G4NuclearLevelData.hh" 39 #include "G4NuclearLevelData.hh"
39 #include "G4PairingCorrection.hh" 40 #include "G4PairingCorrection.hh"
40 #include "G4EvaporationLevelDensityParameter.h 41 #include "G4EvaporationLevelDensityParameter.hh"
41 #include "G4FissionLevelDensityParameter.hh" 42 #include "G4FissionLevelDensityParameter.hh"
42 #include "G4Exp.hh" 43 #include "G4Exp.hh"
43 44
44 G4FissionProbability::G4FissionProbability() : 45 G4FissionProbability::G4FissionProbability() :
45 G4VEmissionProbability(0, 0), 46 G4VEmissionProbability(0, 0),
46 theEvapLDP(new G4EvaporationLevelDensityPara 47 theEvapLDP(new G4EvaporationLevelDensityParameter),
47 theFissLDP(new G4FissionLevelDensityParamete 48 theFissLDP(new G4FissionLevelDensityParameter),
48 ownEvapLDP(true), 49 ownEvapLDP(true),
49 ownFissLDP(true) 50 ownFissLDP(true)
50 { 51 {
51 fPairCorr = G4NuclearLevelData::GetInstance( 52 fPairCorr = G4NuclearLevelData::GetInstance()->GetPairingCorrection();
52 } 53 }
53 54
54 G4FissionProbability::~G4FissionProbability() 55 G4FissionProbability::~G4FissionProbability()
55 { 56 {
56 if (ownEvapLDP) delete theEvapLDP; 57 if (ownEvapLDP) delete theEvapLDP;
57 if (ownFissLDP) delete theFissLDP; 58 if (ownFissLDP) delete theFissLDP;
58 } 59 }
59 60
60 G4double 61 G4double
61 G4FissionProbability::EmissionProbability(cons 62 G4FissionProbability::EmissionProbability(const G4Fragment & fragment,
62 G4double MaximalKineticEnergy) 63 G4double MaximalKineticEnergy)
63 // Compute integrated probability of fission 64 // Compute integrated probability of fission channel
64 { 65 {
65 if (MaximalKineticEnergy <= 0.0) { return 0. 66 if (MaximalKineticEnergy <= 0.0) { return 0.0; }
66 G4int A = fragment.GetA_asInt(); 67 G4int A = fragment.GetA_asInt();
67 G4int Z = fragment.GetZ_asInt(); 68 G4int Z = fragment.GetZ_asInt();
68 G4double U = fragment.GetExcitationEnergy(); 69 G4double U = fragment.GetExcitationEnergy();
69 70
70 G4double Ucompound = U - fPairCorr->GetPairi 71 G4double Ucompound = U - fPairCorr->GetPairingCorrection(A,Z);
>> 72
71 G4double Ufission = U - fPairCorr->GetFissio 73 G4double Ufission = U - fPairCorr->GetFissionPairingCorrection(A,Z);
72 if(Ucompound < 0.0 || Ufission < 0.0) { retu <<
73 74
74 G4double SystemEntropy = 75 G4double SystemEntropy =
75 2.0*std::sqrt(theEvapLDP->LevelDensityPara 76 2.0*std::sqrt(theEvapLDP->LevelDensityParameter(A,Z,Ucompound)*Ucompound);
76 77
77 G4double afission = theFissLDP->LevelDensity 78 G4double afission = theFissLDP->LevelDensityParameter(A,Z,Ufission);
78 79
79 G4double Cf = 2.0*std::sqrt(afission*Maximal 80 G4double Cf = 2.0*std::sqrt(afission*MaximalKineticEnergy);
80 G4double Exp1 = (SystemEntropy <= 160.0) ? G << 81
81 G4double Exp2 = (SystemEntropy-Cf <= 160.0) << 82 // G4double Q1 = 1.0 + (Cf - 1.0)*G4Exp(Cf);
>> 83 // G4double Q2 = 4.0*pi*afission*G4Exp(SystemEntropy);
>> 84
>> 85 // G4double probability = Q1/Q2;
>> 86
>> 87 G4double Exp1 = 0.0;
>> 88 if (SystemEntropy <= 160.0) { Exp1 = G4Exp(-SystemEntropy); }
>> 89 // @@@@@@@@@@@@@@@@@ hpw changed max to min - cannot notify vicente now
>> 90 G4double Exp2 = G4Exp( std::min(300.0,Cf-SystemEntropy) );
82 91
83 // JMQ 14/02/09 BUG fixed in fission probabi 92 // JMQ 14/02/09 BUG fixed in fission probability (missing parenthesis
84 // at denominator) 93 // at denominator)
>> 94 //AH fix from Vincente: G4double probability =
>> 95 // (Exp1 + (1.0-Cf)*Exp2) / 4.0*pi*afission;
>> 96 // G4double probability = (Exp1 + (Cf-1.0)*Exp2) / 4.0*pi*afission;
85 G4double probability = (Exp1 + (Cf-1.0)*Exp2 97 G4double probability = (Exp1 + (Cf-1.0)*Exp2) / (4.0*pi*afission);
86 98
87 return probability; 99 return probability;
88 } 100 }
89 101
90 102