Geant4 Cross Reference

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Geant4/processes/hadronic/models/pre_equilibrium/exciton_model/src/G4PreCompoundDeuteron.cc

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 26 //
 27 // -------------------------------------------------------------------
 28 //
 29 // GEANT4 Class file
 30 //
 31 //
 32 // File name:     G4PreCompoundDeuteron
 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 //
 41 
 42 #include "G4PreCompoundDeuteron.hh"
 43 #include "G4CoulombBarrier.hh"
 44 #include "G4Deuteron.hh"
 45 
 46 G4PreCompoundDeuteron::G4PreCompoundDeuteron()
 47   : G4PreCompoundIon(G4Deuteron::Deuteron(), new G4CoulombBarrier(2, 1))
 48 {}
 49  
 50 G4double G4PreCompoundDeuteron::FactorialFactor(G4int N, G4int P) const
 51 {
 52   return static_cast<G4double>((N-1)*(N-2)*(P-1)*P)*0.5;
 53 }
 54   
 55 G4double G4PreCompoundDeuteron::CoalescenceFactor(G4int A) const
 56 {
 57   return 16.0/static_cast<G4double>(A);
 58 }    
 59 
 60 G4double G4PreCompoundDeuteron::GetRj(G4int nParticles, G4int nCharged) const
 61 {
 62   G4double rj = 0.0;
 63   if(nCharged >=1 && (nParticles-nCharged) >=1) {
 64     G4double denominator = (G4double)(nParticles*(nParticles-1));
 65     rj = 2*nCharged*(nParticles-nCharged)/denominator; 
 66   }
 67   return rj;
 68 }
 69 
 70 G4double G4PreCompoundDeuteron::GetAlpha() const
 71 {
 72   G4double C = 0.0;
 73   if (theFragZ >= 70) 
 74     {
 75       C = 0.10;
 76     } 
 77   else 
 78     {
 79       C = ((((0.15417e-06*theFragZ) - 0.29875e-04)*theFragZ 
 80       + 0.21071e-02)*theFragZ - 0.66612e-01)*theFragZ + 0.98375; 
 81     }
 82   return 1.0 + 0.5*C;
 83 }
 84