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 | // $Id: G4PairingCorrection.cc,v 1.8 2010/11/15 12:41:58 vnivanch Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-04-ref-00 $ |
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28 | // |
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29 | // Hadronic Process: Nuclear De-excitations |
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30 | // by V. Lara |
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31 | |
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32 | |
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33 | #include "G4PairingCorrection.hh" |
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34 | |
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35 | G4PairingCorrection* G4PairingCorrection::theInstance = 0; |
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36 | |
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37 | G4PairingCorrection::G4PairingCorrection() |
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38 | { |
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39 | theCookPairingCorrections = G4CookPairingCorrections::GetInstance(); |
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40 | theCameronGilbertPairingCorrections = G4CameronGilbertPairingCorrections::GetInstance(); |
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41 | // theCameronTruranHilfPairingCorrections = G4CameronTruranHilfPairingCorrections::GetInstance(); |
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42 | } |
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43 | |
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44 | G4PairingCorrection::~G4PairingCorrection() |
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45 | {;} |
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46 | |
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47 | G4PairingCorrection* G4PairingCorrection::GetInstance() |
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48 | { |
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49 | if (!theInstance) { |
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50 | static G4PairingCorrection theCorrections; |
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51 | theInstance = &theCorrections; |
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52 | } |
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53 | return theInstance; |
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54 | } |
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55 | |
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56 | G4double G4PairingCorrection::GetPairingCorrection(G4int A, G4int Z) const |
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57 | { |
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58 | G4double PCorrection = 0.0; |
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59 | G4int N = A - Z; |
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60 | if (theCookPairingCorrections->IsInTableThisN(N) && |
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61 | theCookPairingCorrections->IsInTableThisZ(Z)) |
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62 | PCorrection = theCookPairingCorrections->GetParingCorrection(A,Z); |
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63 | else if (theCameronGilbertPairingCorrections->IsInTableThisN(N) && |
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64 | theCameronGilbertPairingCorrections->IsInTableThisZ(Z)) |
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65 | PCorrection = theCameronGilbertPairingCorrections->GetPairingCorrection(A,Z); |
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66 | else { |
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67 | const G4double PairingConstant = 12.0*MeV; |
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68 | G4double Pair = (1 - Z + 2*(Z/2)) + (1 - N + 2*(N/2)); |
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69 | PCorrection = Pair*PairingConstant/std::sqrt(static_cast<G4double>(A)); |
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70 | } |
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71 | return std::max(PCorrection,0.0); |
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72 | } |
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73 | |
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74 | |
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75 | G4double G4PairingCorrection::GetFissionPairingCorrection(G4int A, G4int Z) const |
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76 | { |
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77 | const G4double PairingConstant = 14.0*MeV; |
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78 | G4int N = A - Z; |
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79 | G4double Pair = (1 - Z + 2*(Z/2)) + (1 - N + 2*(N/2)); |
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80 | G4double PCorrection = Pair*PairingConstant/std::sqrt(static_cast<G4double>(A)); |
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81 | return PCorrection; |
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82 | } |
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