| [819] | 1 | //
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| 2 | // ********************************************************************
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| 3 | // * License and Disclaimer *
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| 4 | // * *
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
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| 7 | // * conditions of the Geant4 Software License, included in the file *
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
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| 9 | // * include a list of copyright holders. *
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| 10 | // * *
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| 11 | // * Neither the authors of this software system, nor their employing *
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| 12 | // * institutes,nor the agencies providing financial support for this *
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| 13 | // * work make any representation or warranty, express or implied, *
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| 14 | // * regarding this software system or assume any liability for its *
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| 15 | // * use. Please see the license in the file LICENSE and URL above *
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| 16 | // * for the full disclaimer and the limitation of liability. *
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| 17 | // * *
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| 18 | // * This code implementation is the result of the scientific and *
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| 19 | // * technical work of the GEANT4 collaboration. *
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| 20 | // * By using, copying, modifying or distributing the software (or *
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| 21 | // * any work based on the software) you agree to acknowledge its *
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| 22 | // * use in resulting scientific publications, and indicate your *
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| 23 | // * acceptance of all terms of the Geant4 Software license. *
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| 24 | // ********************************************************************
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| 25 | //
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| 26 | // 18-Sep-2003 First version is written by T. Koi
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| 27 | // 23-Dec-2006 Isotope dependence added by D. Wright
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| 28 | //
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| 29 |
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| 30 | #include "G4IonsSihverCrossSection.hh"
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| 31 | #include "G4ParticleTable.hh"
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| 32 | #include "G4IonTable.hh"
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| 33 |
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| 34 | G4double G4IonsSihverCrossSection::
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| 35 | GetIsoZACrossSection(const G4DynamicParticle* aParticle, G4double /*ZZ*/,
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| 36 | G4double AA, G4double /*aTemperature*/)
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| 37 | {
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| 38 | G4double xsection = 0.0;
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| 39 |
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| 40 | G4int At = G4int(AA);
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| 41 | //G4int Zt = G4int(ZZ); // not used
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| 42 |
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| 43 | G4int Ap = aParticle->GetDefinition()->GetBaryonNumber();
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| 44 | //Zp = aParticle->GetDefinition()->GetPDGCharge(); // not used
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| 45 |
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| 46 | G4double one_third = 1.0 / 3.0;
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| 47 |
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| 48 | G4double cubicrAt = std::pow ( G4double(At) , G4double(one_third) );
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| 49 | G4double cubicrAp = std::pow ( G4double(Ap) , G4double(one_third) );
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| 50 |
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| 51 | G4double b0 = 1.581 - 0.876 * ( 1.0 / cubicrAp + 1.0 / cubicrAt );
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| 52 |
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| 53 | xsection = pi * square_r0
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| 54 | * std::pow ( G4double(cubicrAp + cubicrAt - b0 * ( 1.0 / cubicrAp + 1.0 / cubicrAt ) ), G4double(2) );
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| 55 |
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| 56 | return xsection;
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| 57 | }
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| 58 |
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| 59 |
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| 60 | G4double G4IonsSihverCrossSection::
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| 61 | GetCrossSection(const G4DynamicParticle* aParticle,
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| 62 | const G4Element* anElement, G4double temperature)
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| 63 | {
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| 64 | G4int nIso = anElement->GetNumberOfIsotopes();
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| 65 | G4double xsection = 0;
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| 66 |
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| 67 | if (nIso) {
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| 68 | G4double sig;
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| 69 | G4IsotopeVector* isoVector = anElement->GetIsotopeVector();
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| 70 | G4double* abundVector = anElement->GetRelativeAbundanceVector();
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| 71 | G4double ZZ;
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| 72 | G4double AA;
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| 73 |
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| 74 | for (G4int i = 0; i < nIso; i++) {
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| 75 | ZZ = G4double( (*isoVector)[i]->GetZ() );
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| 76 | AA = G4double( (*isoVector)[i]->GetN() );
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| 77 | sig = GetIsoZACrossSection(aParticle, ZZ, AA, temperature);
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| 78 | xsection += sig*abundVector[i];
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| 79 | }
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| 80 |
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| 81 | } else {
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| 82 | xsection =
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| 83 | GetIsoZACrossSection(aParticle, anElement->GetZ(), anElement->GetN(),
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| 84 | temperature);
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| 85 | }
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| 86 |
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| 87 | return xsection;
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| 88 | }
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