| 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 | // $Id: G4NeutronHPWattSpectrum.hh,v 1.11 2006/06/29 20:49:39 gunter Exp $ |
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| 28 | // GEANT4 tag $Name: geant4-09-03-ref-09 $ |
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| 29 | // |
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| 30 | #ifndef G4NeutronHPWattSpectrum_h |
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| 31 | #define G4NeutronHPWattSpectrum_h 1 |
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| 32 | |
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| 33 | #include "globals.hh" |
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| 34 | #include "G4NeutronHPVector.hh" |
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| 35 | #include "Randomize.hh" |
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| 36 | #include "G4ios.hh" |
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| 37 | #include <fstream> |
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| 38 | #include "G4VNeutronHPEDis.hh" |
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| 39 | |
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| 40 | // we will need a List of these .... one per term. |
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| 41 | |
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| 42 | class G4NeutronHPWattSpectrum : public G4VNeutronHPEDis |
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| 43 | { |
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| 44 | public: |
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| 45 | G4NeutronHPWattSpectrum() |
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| 46 | { |
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| 47 | expm1 = std::exp(-1.); |
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| 48 | } |
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| 49 | ~G4NeutronHPWattSpectrum() |
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| 50 | { |
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| 51 | } |
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| 52 | |
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| 53 | inline void Init(std::ifstream & aDataFile) |
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| 54 | { |
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| 55 | theFractionalProb.Init(aDataFile, eV); |
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| 56 | theApar.Init(aDataFile, eV); |
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| 57 | theBpar.Init(aDataFile, eV); |
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| 58 | } |
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| 59 | |
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| 60 | inline G4double GetFractionalProbability(G4double anEnergy) |
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| 61 | { |
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| 62 | return theFractionalProb.GetY(anEnergy); |
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| 63 | } |
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| 64 | |
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| 65 | G4double Sample(G4double anEnergy); |
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| 66 | |
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| 67 | private: |
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| 68 | |
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| 69 | inline G4double Watt(G4double anEnergy, G4double a, G4double b) |
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| 70 | { |
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| 71 | G4double energy = anEnergy/eV; |
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| 72 | G4double result = std::exp(-energy/a)*std::sinh(std::sqrt(b*energy)); |
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| 73 | return result; |
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| 74 | } |
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| 75 | |
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| 76 | private: |
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| 77 | |
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| 78 | G4double expm1; |
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| 79 | |
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| 80 | G4NeutronHPVector theFractionalProb; |
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| 81 | |
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| 82 | G4NeutronHPVector theApar; |
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| 83 | G4NeutronHPVector theBpar; |
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| 84 | |
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| 85 | }; |
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| 86 | |
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| 87 | #endif |
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