| 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 | #include "G4FissionStore.hh" |
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| 27 | #include <cmath> |
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| 28 | |
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| 29 | G4FissionStore::G4FissionStore() |
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| 30 | : verboseLevel(0){ |
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| 31 | |
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| 32 | if (verboseLevel > 3) { |
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| 33 | G4cout << " >>> G4FissionStore::G4FissionStore" << G4endl; |
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| 34 | } |
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| 35 | } |
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| 36 | |
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| 37 | G4FissionConfiguration G4FissionStore::generateConfiguration(G4double amax, |
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| 38 | G4double rand) const { |
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| 39 | |
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| 40 | if (verboseLevel > 3) { |
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| 41 | G4cout << " >>> G4FissionStore::generateConfiguration" << G4endl; |
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| 42 | } |
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| 43 | |
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| 44 | const G4double small = -30.0; |
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| 45 | |
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| 46 | G4double totProb = 0.0; |
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| 47 | std::vector<G4double> probs(configurations.size()); |
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| 48 | |
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| 49 | // G4cout << " amax " << amax << " ic " << configurations.size() << G4endl; |
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| 50 | |
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| 51 | for (G4int i = 0; i < G4int(configurations.size()); i++) { |
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| 52 | G4double ez = configurations[i].ezet; |
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| 53 | G4double pr = ez - amax; |
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| 54 | |
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| 55 | if (pr < small) pr = small; |
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| 56 | pr = std::exp(pr); |
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| 57 | // configurations[i].print(); |
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| 58 | // G4cout << " probability " << pr << G4endl; |
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| 59 | totProb += pr; |
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| 60 | probs[i] = totProb; |
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| 61 | }; |
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| 62 | |
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| 63 | G4double st = totProb * rand; |
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| 64 | G4int igen = 0; |
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| 65 | |
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| 66 | while (probs[igen] <= st && igen < G4int(configurations.size())) igen++; |
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| 67 | |
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| 68 | // G4cout << " igen " << igen << G4endl; |
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| 69 | |
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| 70 | return configurations[igen]; |
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| 71 | } |
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