| 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 | // neutron_hp -- source file
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| 27 | // J.P. Wellisch, Nov-1996
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| 28 | // A prototype of the low energy neutron transport model.
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| 29 | //
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| 30 | #include "G4NeutronHPDeExGammas.hh"
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| 31 |
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| 32 | void G4NeutronHPDeExGammas::Init(std::ifstream & aDataFile)
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| 33 | {
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| 34 | G4NeutronHPGamma ** theGammas = new G4NeutronHPGamma * [50];
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| 35 | G4int nGammas = 0;
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| 36 | G4int nBuff = 50;
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| 37 | for(;;)
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| 38 | {
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| 39 | G4NeutronHPGamma * theNew = new G4NeutronHPGamma;
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| 40 | if(!theNew->Init(aDataFile))
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| 41 | {
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| 42 | delete theNew;
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| 43 | break;
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| 44 | }
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| 45 | else
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| 46 | {
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| 47 | if(nGammas==nBuff)
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| 48 | {
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| 49 | nBuff+=50;
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| 50 | G4NeutronHPGamma ** buffer = new G4NeutronHPGamma * [nBuff];
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| 51 | for(G4int i=0;i<nGammas;i++) buffer[i] = theGammas[i];
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| 52 | delete [] theGammas;
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| 53 | theGammas = buffer;
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| 54 | }
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| 55 | theGammas[nGammas] = theNew;
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| 56 | nGammas++;
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| 57 | }
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| 58 | }
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| 59 | // all gammas are in. Now sort them into levels.
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| 60 |
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| 61 | // count the levels
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| 62 |
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| 63 | G4double currentE = 0;
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| 64 | G4double nextE = 0;
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| 65 | G4int i;
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| 66 | G4double epsilon = 0.01*keV;
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| 67 | for(i=0; i<nGammas; i++)
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| 68 | {
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| 69 | nextE = theGammas[i]->GetLevelEnergy();
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| 70 | if(std::abs(currentE-nextE)>epsilon) nLevels++;
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| 71 | currentE = nextE;
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| 72 | }
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| 73 |
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| 74 | // Build the levels
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| 75 |
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| 76 | theLevels = new G4NeutronHPLevel[nLevels];
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| 77 | levelStart = new G4int [nLevels];
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| 78 | levelSize = new G4int [nLevels];
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| 79 |
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| 80 | // fill the levels
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| 81 |
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| 82 | currentE = 0;
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| 83 | nextE = 0;
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| 84 | G4int levelCounter=-1;
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| 85 | for(i=0; i<nGammas; i++)
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| 86 | {
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| 87 | nextE = theGammas[i]->GetLevelEnergy();
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| 88 | if(std::abs(currentE-nextE)>epsilon)
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| 89 | {
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| 90 | levelCounter++;
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| 91 | levelStart[levelCounter] = i;
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| 92 | levelSize[levelCounter] = 0;
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| 93 | }
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| 94 | levelSize[levelCounter]++;
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| 95 | currentE = nextE;
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| 96 | }
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| 97 |
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| 98 | for(i=0; i<nLevels; i++)
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| 99 | {
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| 100 | theLevels[i].SetNumberOfGammas(levelSize[i]);
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| 101 | for(G4int ii=levelStart[i]; ii<levelStart[i]+levelSize[i]; ii++)
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| 102 | {
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| 103 | theLevels[i].SetGamma(ii-levelStart[i], theGammas[ii]);
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| 104 | }
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| 105 | }
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| 106 |
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| 107 | // set the next relation in the gammas.
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| 108 | G4double levelE, gammaE, currentLevelE;
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| 109 | G4double min;
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| 110 | for(i=0; i<nGammas; i++)
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| 111 | {
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| 112 | G4int it=-1;
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| 113 | gammaE = theGammas[i]->GetGammaEnergy();
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| 114 | currentLevelE = theGammas[i]->GetLevelEnergy();
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| 115 | min = currentLevelE-gammaE-epsilon;
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| 116 | for(G4int ii=0; ii<nLevels; ii++)
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| 117 | {
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| 118 | levelE = theLevels[ii].GetLevelEnergy();
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| 119 | if(std::abs(currentLevelE-(levelE+gammaE))<min)
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| 120 | {
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| 121 | min = std::abs(currentLevelE-(levelE+gammaE));
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| 122 | it = ii;
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| 123 | }
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| 124 | }
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| 125 | if(it!=-1) theGammas[i]->SetNext(&theLevels[it]);
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| 126 | }
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| 127 | // some garbage collection
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| 128 |
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| 129 | delete [] theGammas;
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| 130 |
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| 131 | // and we are Done.
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| 132 | }
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