Gabriele Cosmo
97 lines
3.2 KiB
C++
97 lines
3.2 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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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. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4NeutronHPNBodyPhaseSpace.hh,v 1.8 2002/12/12 19:18:14 gunter Exp $
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// GEANT4 tag $Name: geant4-05-00 $
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//
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#ifndef G4NeutronHPNBodyPhaseSpace_h
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#define G4NeutronHPNBodyPhaseSpace_h 1
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#include "G4ios.hh"
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#include "g4std/fstream"
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#include "globals.hh"
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#include "G4Neutron.hh"
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#include "G4VNeutronHPEnergyAngular.hh"
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#include "G4ReactionProduct.hh"
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class G4NeutronHPNBodyPhaseSpace : public G4VNeutronHPEnergyAngular
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{
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public:
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G4NeutronHPNBodyPhaseSpace(){}
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~G4NeutronHPNBodyPhaseSpace(){}
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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(G4std::ifstream & 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 = sqrt(anEnergy)*pow(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./pi/pow(GetEmax(anEnergy, mass),2);
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if(theTotalCount==4) result = 105./32./pow(GetEmax(anEnergy, mass), 3.5);
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if(theTotalCount==5) result = 256./14./pi/pow(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 = GetNeutron()->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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