| 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 | // |
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| 27 | // ------------------------------------------------------------------- |
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| 28 | // |
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| 29 | // GEANT4 Class file |
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| 30 | // |
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| 31 | // |
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| 32 | // File name: G4VhShellCrossSection |
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| 33 | // |
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| 34 | // Author: V.Ivanchenko (Vladimir.Ivanchenko@cern.ch) |
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| 35 | // |
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| 36 | // History: |
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| 37 | // ----------- |
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| 38 | // 20 Oct 2001 V.Ivanchenko 1st implementation |
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| 39 | // 24 Oct 2001 MGP Minor clean-up |
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| 40 | // 29 Oct 2001 VI Add delta energy |
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| 41 | // |
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| 42 | // ------------------------------------------------------------------- |
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| 43 | |
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| 44 | #include "G4VhShellCrossSection.hh" |
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| 45 | #include "Randomize.hh" |
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| 46 | |
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| 47 | G4VhShellCrossSection::G4VhShellCrossSection() |
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| 48 | { } |
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| 49 | |
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| 50 | |
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| 51 | G4VhShellCrossSection::~G4VhShellCrossSection() |
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| 52 | { } |
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| 53 | |
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| 54 | void G4VhShellCrossSection :: SetTotalCS(G4double) |
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| 55 | { |
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| 56 | } |
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| 57 | |
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| 58 | |
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| 59 | G4int G4VhShellCrossSection::SelectRandomShell(G4int Z, |
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| 60 | G4double incidentEnergy, |
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| 61 | G4double mass, |
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| 62 | G4double deltaEnergy) const |
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| 63 | // returns the shell ionized if the shell exists. If the shell is not counted, it returns -1 |
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| 64 | |
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| 65 | { |
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| 66 | std::vector<G4double> p = Probabilities(Z,incidentEnergy,mass,deltaEnergy); |
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| 67 | G4int shell = -1; |
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| 68 | size_t nShells = p.size(); |
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| 69 | G4double q = G4UniformRand(); |
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| 70 | for (size_t i=0; i<nShells; i++) { |
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| 71 | |
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| 72 | if (p[i] >= q) { |
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| 73 | shell = i; |
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| 74 | break; |
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| 75 | } |
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| 76 | q -= p[i]; |
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| 77 | } |
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| 78 | return shell; |
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| 79 | } |
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| 80 | |
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| 81 | |
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