[819] | 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 | // GEANT 4 class implementation file |
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| 29 | // |
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| 30 | // CERN, Geneva, Switzerland |
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| 31 | // |
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| 32 | // File name: G4ProtonField.cc |
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| 33 | // |
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| 34 | // Author: Alessandro Brunengo (Alessandro.Brunengo@ge.infn.it) |
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| 35 | // |
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| 36 | // Creation date: 5 June 2000 |
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| 37 | // ------------------------------------------------------------------- |
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| 38 | #include "G4ProtonField.hh" |
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| 39 | #include "G4NucleiPropertiesTable.hh" |
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| 40 | #include "G4VNuclearDensity.hh" |
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| 41 | #include "G4FermiMomentum.hh" |
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| 42 | #include "G4V3DNucleus.hh" |
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| 43 | |
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| 44 | G4ProtonField::G4ProtonField(G4V3DNucleus * aNucleus) : |
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| 45 | G4VNuclearField(aNucleus), theDensity(theNucleus->GetNuclearDensity()) |
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| 46 | { |
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| 47 | theA = theNucleus->GetMassNumber(); |
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| 48 | theZ = theNucleus->GetCharge(); |
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| 49 | theBarrier = GetBarrier(); |
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| 50 | theRadius = 2.*theNucleus->GetOuterRadius(); |
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| 51 | theFermi.Init(theA, theZ); |
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| 52 | G4double aR=0; |
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| 53 | while(aR<theRadius) |
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| 54 | { |
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| 55 | G4ThreeVector aPosition(0,0,aR); |
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| 56 | G4double density = GetDensity(aPosition); |
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| 57 | G4double fermiMom = GetFermiMomentum(density); |
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| 58 | theFermiMomBuffer.push_back(fermiMom); |
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| 59 | aR+=0.3*fermi; |
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| 60 | } |
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| 61 | { |
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| 62 | G4ThreeVector aPosition(0,0,theRadius); |
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| 63 | G4double density = GetDensity(aPosition); |
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| 64 | G4double fermiMom = GetFermiMomentum(density); |
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| 65 | theFermiMomBuffer.push_back(fermiMom); |
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| 66 | } |
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| 67 | { |
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| 68 | G4ThreeVector aPosition(0,0,theRadius+0.001*fermi); |
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| 69 | theFermiMomBuffer.push_back(0); |
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| 70 | } |
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| 71 | { |
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| 72 | G4ThreeVector aPosition(0,0,1.*m); |
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| 73 | theFermiMomBuffer.push_back(0); |
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| 74 | } |
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| 75 | } |
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| 76 | |
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| 77 | |
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| 78 | G4ProtonField::~G4ProtonField() |
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| 79 | { } |
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| 80 | |
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| 81 | |
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| 82 | const G4ProtonField & G4ProtonField::operator=(const G4ProtonField &) |
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| 83 | { |
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| 84 | throw G4HadronicException(__FILE__, __LINE__, "G4ProtonField::operator= meant not to be accessible"); |
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| 85 | return *this; |
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| 86 | } |
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| 87 | |
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| 88 | |
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| 89 | G4int G4ProtonField::operator==(const G4ProtonField &) const |
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| 90 | { |
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| 91 | throw G4HadronicException(__FILE__, __LINE__, "G4ProtonField::operator== meant not to be accessible"); |
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| 92 | return 0; |
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| 93 | } |
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| 94 | |
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| 95 | |
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| 96 | G4int G4ProtonField::operator!=(const G4ProtonField &) const |
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| 97 | { |
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| 98 | throw G4HadronicException(__FILE__, __LINE__, "G4ProtonField::operator!= meant not to be accessible"); |
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| 99 | return 1; |
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| 100 | } |
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| 101 | |
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| 102 | |
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| 103 | G4double G4ProtonField::GetField(const G4ThreeVector & aPosition) |
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| 104 | { |
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| 105 | //G4cout << " Fermi Potential " << (fermiMom*fermiMom)/(2*proton_mass_c2) <<G4endl; |
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| 106 | G4double x = aPosition.mag(); |
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| 107 | G4int index = static_cast<G4int>(x/(0.3*fermi) ); |
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| 108 | if(index+2>static_cast<G4int>(theFermiMomBuffer.size())) return theFermiMomBuffer.back(); |
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| 109 | G4double y1 = theFermiMomBuffer[index]; |
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| 110 | G4double y2 = theFermiMomBuffer[index+1]; |
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| 111 | G4double x1 = (0.3*fermi)*index; |
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| 112 | G4double x2 = (0.3*fermi)*(index+1); |
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| 113 | G4double fermiMom = y1 + (x-x1)*(y2-y1)/(x2-x1); |
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| 114 | G4double y = -1*(fermiMom*fermiMom)/(2*proton_mass_c2)+theBarrier; |
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| 115 | // G4cout <<" Protonfield test "<<index<<" "<< x1<<" "<<y1<<" "<<x2<<" "<<y2<<" "<<x<<" "<<y<<" "<<theBarrier<<G4endl; |
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| 116 | return y; |
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| 117 | } |
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| 118 | |
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| 119 | |
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| 120 | |
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| 121 | G4double G4ProtonField::GetBarrier() |
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| 122 | { |
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| 123 | G4double coulombBarrier = (1.44/1.14) * MeV * theZ / (1.0 + std::pow(theA,1./3.)); |
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| 124 | //GF G4double bindingEnergy = G4NucleiPropertiesTable::GetBindingEnergy(Z, A); |
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| 125 | G4double bindingEnergy =0; |
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| 126 | /* |
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| 127 | * G4cout << " coulombBarrier/bindingEnergy : " |
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| 128 | * << coulombBarrier << " /" << bindingEnergy << G4endl; |
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| 129 | */ |
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| 130 | return bindingEnergy/theA+coulombBarrier; |
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| 131 | } |
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| 132 | |
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| 133 | |
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