Gabriele Cosmo
101 lines
3.8 KiB
C++
101 lines
3.8 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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//
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// Hadronic Process: Nuclear De-excitations
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// by V. Lara
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#include "G4StatMFMacroNucleon.hh"
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#include "G4PhysicalConstants.hh"
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#include "G4SystemOfUnits.hh"
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#include "G4Log.hh"
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#include "G4Exp.hh"
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G4StatMFMacroNucleon::G4StatMFMacroNucleon()
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: G4VStatMFMacroCluster(1), _NeutronMeanMultiplicity(0.0),
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_ProtonMeanMultiplicity(0.0)
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{}
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G4StatMFMacroNucleon::~G4StatMFMacroNucleon()
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{}
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G4double
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G4StatMFMacroNucleon::CalcMeanMultiplicity(const G4double FreeVol,
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const G4double mu,
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const G4double nu, const G4double T)
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{
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if (T <= 0.0) {
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throw G4HadronicException(__FILE__, __LINE__,
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"G4StatMFMacroNucleon::CalcMeanMultiplicity: Temperature less or equal 0");
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}
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G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T);
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G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght;
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static const G4double degeneracy = 2.0;
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G4double exponent_proton = (mu + nu - G4StatMFParameters::GetCoulomb())/T;
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G4double exponent_neutron = mu/T;
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if (exponent_neutron > 300.0) exponent_neutron = 300.0;
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if (exponent_proton > 300.0) exponent_proton = 300.0;
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_NeutronMeanMultiplicity =
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(degeneracy*FreeVol/lambda3)*G4Exp(exponent_neutron);
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_ProtonMeanMultiplicity =
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(degeneracy*FreeVol/lambda3)*G4Exp(exponent_proton);
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return _MeanMultiplicity = _NeutronMeanMultiplicity + _ProtonMeanMultiplicity;
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}
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G4double G4StatMFMacroNucleon::CalcEnergy(const G4double T)
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{
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return _Energy = G4StatMFParameters::GetCoulomb()*theZARatio*theZARatio + 1.5*T;
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}
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G4double
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G4StatMFMacroNucleon::CalcEntropy(const G4double T, const G4double FreeVol)
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{
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G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T);
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G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght;
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G4double NeutronEntropy = 0.0;
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if (_NeutronMeanMultiplicity > 0.0)
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NeutronEntropy = _NeutronMeanMultiplicity*(2.5+G4Log(2*theA*FreeVol/
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(lambda3*_NeutronMeanMultiplicity)));
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G4double ProtonEntropy = 0.0;
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if (_ProtonMeanMultiplicity > 0.0)
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ProtonEntropy = _ProtonMeanMultiplicity*(2.5+G4Log(2*theA*FreeVol/
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(lambda3*_ProtonMeanMultiplicity)));
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return NeutronEntropy+ProtonEntropy;
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}
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