Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/processes/hadronic/models/particle_hp/include/G4ParticleHPWattSpectrum.hh

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 26 //
 27 // P. Arce, June-2014 Conversion neutron_hp to particle_hp
 28 //
 29 #ifndef G4ParticleHPWattSpectrum_h
 30 #define G4ParticleHPWattSpectrum_h 1
 31 
 32 #include "G4Exp.hh"
 33 #include "G4ParticleHPVector.hh"
 34 #include "G4VParticleHPEDis.hh"
 35 #include "G4ios.hh"
 36 #include "Randomize.hh"
 37 #include "globals.hh"
 38 
 39 #include <CLHEP/Units/SystemOfUnits.h>
 40 
 41 #include <fstream>
 42 
 43 // we will need a List of these .... one per term.
 44 
 45 class G4ParticleHPWattSpectrum : public G4VParticleHPEDis
 46 {
 47   public:
 48     G4ParticleHPWattSpectrum() { expm1 = G4Exp(-1.); }
 49     ~G4ParticleHPWattSpectrum() override = default;
 50 
 51     inline void Init(std::istream& aDataFile) override
 52     {
 53       theFractionalProb.Init(aDataFile, CLHEP::eV);
 54       theApar.Init(aDataFile, CLHEP::eV);
 55       theBpar.Init(aDataFile, CLHEP::eV);
 56     }
 57 
 58     inline G4double GetFractionalProbability(G4double anEnergy) override
 59     {
 60       return theFractionalProb.GetY(anEnergy);
 61     }
 62 
 63     G4double Sample(G4double anEnergy) override;
 64 
 65   private:
 66     inline G4double Watt(G4double anEnergy, G4double a, G4double b)
 67     {
 68       G4double energy = anEnergy / CLHEP::eV;
 69       G4double result = G4Exp(-energy / a) * std::sinh(std::sqrt(b * energy));
 70       return result;
 71     }
 72 
 73   private:
 74     G4double expm1;
 75 
 76     G4ParticleHPVector theFractionalProb;
 77 
 78     G4ParticleHPVector theApar;
 79     G4ParticleHPVector theBpar;
 80 };
 81 
 82 #endif
 83