Geant4 Cross Reference |
1 // 1 2 // ******************************************* 3 // * License and Disclaimer 4 // * 5 // * The Geant4 software is copyright of th 6 // * the Geant4 Collaboration. It is provided 7 // * conditions of the Geant4 Software License 8 // * LICENSE and available at http://cern.ch/ 9 // * include a list of copyright holders. 10 // * 11 // * Neither the authors of this software syst 12 // * institutes,nor the agencies providing fin 13 // * work make any representation or warran 14 // * regarding this software system or assum 15 // * use. Please see the license in the file 16 // * for the full disclaimer and the limitatio 17 // * 18 // * This code implementation is the result 19 // * technical work of the GEANT4 collaboratio 20 // * By using, copying, modifying or distri 21 // * any work based on the software) you ag 22 // * use in resulting scientific publicati 23 // * acceptance of all terms of the Geant4 Sof 24 // ******************************************* 25 // 26 // 27 // 28 // Hadronic Process: Nuclear De-excitations 29 // by V. Lara (Oct 1998) 30 // 31 // 32 // J.M.Quesada (14 february 2009) bug fixed in 33 // parenthesis 34 35 36 #include "G4FissionProbability.hh" 37 #include "G4PhysicalConstants.hh" 38 #include "G4NuclearLevelData.hh" 39 #include "G4PairingCorrection.hh" 40 #include "G4EvaporationLevelDensityParameter.h 41 #include "G4FissionLevelDensityParameter.hh" 42 #include "G4Exp.hh" 43 44 G4FissionProbability::G4FissionProbability() : 45 G4VEmissionProbability(0, 0), 46 theEvapLDP(new G4EvaporationLevelDensityPara 47 theFissLDP(new G4FissionLevelDensityParamete 48 ownEvapLDP(true), 49 ownFissLDP(true) 50 { 51 fPairCorr = G4NuclearLevelData::GetInstance( 52 } 53 54 G4FissionProbability::~G4FissionProbability() 55 { 56 if (ownEvapLDP) delete theEvapLDP; 57 if (ownFissLDP) delete theFissLDP; 58 } 59 60 G4double 61 G4FissionProbability::EmissionProbability(cons 62 G4double MaximalKineticEnergy) 63 // Compute integrated probability of fission 64 { 65 if (MaximalKineticEnergy <= 0.0) { return 0. 66 G4int A = fragment.GetA_asInt(); 67 G4int Z = fragment.GetZ_asInt(); 68 G4double U = fragment.GetExcitationEnergy(); 69 70 G4double Ucompound = U - fPairCorr->GetPairi 71 G4double Ufission = U - fPairCorr->GetFissio 72 if(Ucompound < 0.0 || Ufission < 0.0) { retu 73 74 G4double SystemEntropy = 75 2.0*std::sqrt(theEvapLDP->LevelDensityPara 76 77 G4double afission = theFissLDP->LevelDensity 78 79 G4double Cf = 2.0*std::sqrt(afission*Maximal 80 G4double Exp1 = (SystemEntropy <= 160.0) ? G 81 G4double Exp2 = (SystemEntropy-Cf <= 160.0) 82 83 // JMQ 14/02/09 BUG fixed in fission probabi 84 // at denominator) 85 G4double probability = (Exp1 + (Cf-1.0)*Exp2 86 87 return probability; 88 } 89 90