Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/processes/hadronic/models/de_excitation/evaporation/src/G4AlphaEvaporationProbability.cc

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 26 //
 27 // J.M. Quesada (August2008). Based on:
 28 //
 29 // Hadronic Process: Nuclear De-excitations
 30 // by V. Lara (Oct 1998)
 31 //
 32 // Modified:
 33 // 03-09-2008 J.M. Quesada for external choice of inverse cross section option
 34 // 17-11-2010 V.Ivanchenko integer Z and A
 35 
 36 #include "G4AlphaEvaporationProbability.hh"
 37 
 38 G4AlphaEvaporationProbability::G4AlphaEvaporationProbability() :
 39     G4EvaporationProbability(4,2,1.0) 
 40 {}
 41 
 42 G4double G4AlphaEvaporationProbability::CalcAlphaParam(const G4Fragment& fr)
 43 {
 44   // Data comes from 
 45   // Dostrovsky, Fraenkel and Friedlander
 46   // Physical Review, vol 116, num. 3 1959
 47   // 
 48   // const G4int size = 5;
 49   // G4double Zlist[5] = { 10.0, 20.0, 30.0, 50.0, 70.0};
 50   //  G4double Calpha[5] = { 0.10, 0.10, 0.10, 0.08, 0.06};
 51 
 52   G4int aZ = fr.GetZ_asInt() - GetZ();
 53   G4double C;
 54   
 55   if (aZ <= 30) 
 56     {
 57       C = 0.10;
 58     }
 59   else if (aZ <= 50)
 60     {
 61       C = 0.1 - (aZ-30)*0.001;
 62     }
 63   else if (aZ < 70)
 64     {
 65       C = 0.08 - (aZ-50)*0.001;
 66     }
 67   else 
 68     {
 69       C = 0.06;
 70     }
 71   return 1.0 + C;
 72 }
 73   
 74 G4double G4AlphaEvaporationProbability::CalcBetaParam(const G4Fragment &) 
 75 { 
 76   return 0.0; 
 77 }
 78