Geant4 Cross Reference

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Geant4/processes/hadronic/models/pre_equilibrium/exciton_model/src/G4PreCompoundHe3.cc

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 26 //
 27 // -------------------------------------------------------------------
 28 //
 29 // GEANT4 Class file
 30 //
 31 //
 32 // File name:     G4PreCompoundHe3
 33 //
 34 // Author:         V.Lara
 35 //
 36 // Modified:  
 37 // 21.08.2008 J. M. Quesada add choice of options  
 38 // 20.08.2010 V.Ivanchenko added G4Pow and G4PreCompoundParameters pointers
 39 //                         use int Z and A and cleanup
 40 // 05.07.2013 J.M. Quesada FactorialFactor fixed
 41 //
 42  
 43 #include "G4PreCompoundHe3.hh"
 44 #include "G4CoulombBarrier.hh"
 45 #include "G4He3.hh"
 46 
 47 G4PreCompoundHe3::G4PreCompoundHe3()
 48   : G4PreCompoundIon(G4He3::He3(), new G4CoulombBarrier(3, 2))
 49 {}
 50 
 51 G4double G4PreCompoundHe3::FactorialFactor(G4int N, G4int P) const
 52 {
 53   return static_cast<G4double>(((N-3)*(P-2)*(N-2))*((P-1)*(N-1)*P))/12.0; 
 54 }
 55   
 56 G4double G4PreCompoundHe3::CoalescenceFactor(G4int A) const
 57 {
 58   return 243.0/static_cast<G4double>(A*A);
 59 }    
 60 
 61 G4double G4PreCompoundHe3::GetRj(G4int nParticles, G4int nCharged) const
 62 {
 63   G4double rj = 0.0;
 64   if(nCharged >=2 && (nParticles-nCharged) >= 1) {
 65     G4double denominator = (G4double)(nParticles*(nParticles-1)*(nParticles-2));
 66     rj = (3*nCharged*(nCharged-1)*(nParticles-nCharged))/denominator;  
 67   }
 68   return rj;
 69 }
 70 
 71 G4double G4PreCompoundHe3::GetAlpha() const
 72 {
 73   G4double C = 0.0;
 74   if (theFragZ <= 30) 
 75     {
 76       C = 0.10;
 77     }
 78   else if (theFragZ <= 50) 
 79     {
 80       C = 0.1 - (theFragZ - 30)*0.001;
 81     } 
 82   else if (theFragZ < 70) 
 83     {
 84       C = 0.08 - (theFragZ - 50)*0.001;
 85     }
 86   else 
 87     {
 88       C = 0.06;
 89     }
 90   return 1.0 + C*(4.0/3.0);
 91 }
 92 
 93