Gabriele Cosmo
73 lines
2.7 KiB
C++
73 lines
2.7 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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#include "G4GammaAnnCrossSection.hh"
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#include "G4Gamma.hh"
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G4GammaAnnCrossSection::
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G4GammaAnnCrossSection()
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{
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// pho0 Nucleon
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theGammaNucXSections.push_back(new G4ASCCrossSection(113, 2212, 13.7, 35.9, 0.45, 0.079));
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// omega0 Nucleon
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theGammaNucXSections.push_back(new G4ASCCrossSection(223, 2212, 13.7, 35.9, 0.45, 0.079));
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// phi0 Nucleon
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theGammaNucXSections.push_back(new G4ASCCrossSection(333, 2212, 12.2, 26.4, 0.50, 0.079));
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}
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G4bool G4GammaAnnCrossSection::
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InCharge(G4int aCode, G4int bCode)
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{
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G4bool result = false;
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if(aCode==G4Gamma::Gamma()->GetPDGEncoding())
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{
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result=true;
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}
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else if(bCode==G4Gamma::Gamma()->GetPDGEncoding())
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{
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result = true;
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}
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return result;
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}
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G4double G4GammaAnnCrossSection::
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GetXsec(G4double s)
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{
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G4double result = 0;
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// ratios from Phys.Lett.B40:121-126,1972; 22% assigned to higher resonances
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typedef std::vector<G4ASCCrossSection*>::iterator iter;
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iter i;
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for(i=theGammaNucXSections.begin(); i!=theGammaNucXSections.end(); i++)
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{
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result += (*i)->GetXsec(s);
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}
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// Account for higher resonances.
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result /= 0.78;
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return result;
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}
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