Gabriele Cosmo
106 lines
3.7 KiB
C++
106 lines
3.7 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// P. Arce, June-2014 Conversion neutron_hp to particle_hp
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//
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#ifndef G4ParticleHPNBodyPhaseSpace_h
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#define G4ParticleHPNBodyPhaseSpace_h 1
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#include <fstream>
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#include <CLHEP/Units/PhysicalConstants.h>
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#include "globals.hh"
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#include "G4Pow.hh"
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#include "G4ios.hh"
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#include "G4Neutron.hh"
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#include "G4VParticleHPEnergyAngular.hh"
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#include "G4ReactionProduct.hh"
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class G4ParticleHPNBodyPhaseSpace : public G4VParticleHPEnergyAngular
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{
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public:
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G4ParticleHPNBodyPhaseSpace(){
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theTotalMass = 0.0;
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theTotalCount = 0;
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}
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~G4ParticleHPNBodyPhaseSpace(){}
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public:
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void Init(G4double aMass, G4int aCount)
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{
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theTotalMass=aMass;
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theTotalCount=aCount;
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}
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void Init(std::istream & aDataFile)
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{
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aDataFile >> theTotalMass >> theTotalCount;
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theTotalMass *= G4Neutron::Neutron()->GetPDGMass();
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}
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G4ReactionProduct * Sample(G4double anEnergy, G4double massCode, G4double mass);
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private:
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inline G4double Prob(G4double anEnergy, G4double eMax, G4int n)
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{
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G4double result;
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result = std::sqrt(anEnergy)*G4Pow::GetInstance()->powA(eMax-anEnergy, 3.*n/2.-4.);
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return result;
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}
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inline G4double C(G4double anEnergy, G4double mass)
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{
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G4double result(0);
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if(theTotalCount==3) result = 4./CLHEP::pi/G4Pow::GetInstance()->powN(GetEmax(anEnergy, mass),2);
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if(theTotalCount==4) result = 105./32./G4Pow::GetInstance()->powA(GetEmax(anEnergy, mass), 3.5);
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//if(theTotalCount==5) result = 256./14./CLHEP::pi/G4Pow::GetInstance()->powA(GetEmax(anEnergy, mass), 5.);
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if(theTotalCount==5) result = 256./14./CLHEP::pi/G4Pow::GetInstance()->powN(GetEmax(anEnergy, mass), 5);
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return result;
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}
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inline G4double GetEmax(G4double anEnergy, G4double mass)
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{
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G4double result;
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G4double tMass = GetTarget()->GetMass();
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G4double pMass = GetProjectileRP()->GetMass();
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G4double availableEnergy = GetQValue() + anEnergy*tMass/(pMass+tMass);
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result = availableEnergy*(theTotalMass-mass)/theTotalMass;
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return result;
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}
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G4double MeanEnergyOfThisInteraction() {return -1; }
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private:
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G4double theTotalMass;
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G4int theTotalCount;
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};
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#endif
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