[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 | // * * |
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| 21 | // * Parts of this code which have been developed by QinetiQ Ltd * |
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| 22 | // * under contract to the European Space Agency (ESA) are the * |
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| 23 | // * intellectual property of ESA. Rights to use, copy, modify and * |
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| 24 | // * redistribute this software for general public use are granted * |
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| 25 | // * in compliance with any licensing, distribution and development * |
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| 26 | // * policy adopted by the Geant4 Collaboration. This code has been * |
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| 27 | // * written by QinetiQ Ltd for the European Space Agency, under ESA * |
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| 28 | // * contract 17191/03/NL/LvH (Aurora Programme). * |
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| 29 | // * * |
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| 30 | // * By using, copying, modifying or distributing the software (or * |
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| 31 | // * any work based on the software) you agree to acknowledge its * |
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| 32 | // * use in resulting scientific publications, and indicate your * |
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| 33 | // * acceptance of all terms of the Geant4 Software license. * |
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| 34 | // ******************************************************************** |
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| 35 | // |
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| 36 | // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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| 37 | // |
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| 38 | // MODULE: G4NuclearAbrasionGeometry.cc |
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| 39 | // |
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| 40 | // Version: B.1 |
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| 41 | // Date: 15/04/04 |
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| 42 | // Author: P R Truscott |
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| 43 | // Organisation: QinetiQ Ltd, UK |
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| 44 | // Customer: ESA/ESTEC, NOORDWIJK |
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| 45 | // Contract: 17191/03/NL/LvH |
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| 46 | // |
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| 47 | // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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| 48 | // |
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| 49 | // CHANGE HISTORY |
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| 50 | // -------------- |
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| 51 | // |
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| 52 | // 18 November 2003, P R Truscott, QinetiQ Ltd, UK |
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| 53 | // Created. |
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| 54 | // |
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| 55 | // 15 March 2004, P R Truscott, QinetiQ Ltd, UK |
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| 56 | // Beta release |
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| 57 | // |
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| 58 | // 4 June 2004, J.P. Wellisch, CERN, Switzerland |
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| 59 | // resolving technical portability issues. |
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| 60 | // |
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| 61 | // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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| 62 | //////////////////////////////////////////////////////////////////////////////// |
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| 63 | // |
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| 64 | #include "G4NuclearAbrasionGeometry.hh" |
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| 65 | #include "G4WilsonRadius.hh" |
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| 66 | //////////////////////////////////////////////////////////////////////////////// |
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| 67 | // |
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| 68 | G4NuclearAbrasionGeometry::G4NuclearAbrasionGeometry (G4double AP1, |
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| 69 | G4double AT1, G4double r1) |
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| 70 | { |
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| 71 | // |
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| 72 | // |
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| 73 | // Initialise variables for interaction geometry. |
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| 74 | // |
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| 75 | G4WilsonRadius aR; |
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| 76 | AP = AP1; |
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| 77 | AT = AT1; |
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| 78 | rP = aR.GetWilsonRadius(AP); |
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| 79 | rT = aR.GetWilsonRadius(AT); |
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| 80 | r = r1; |
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| 81 | n = rP / (rP + rT); |
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| 82 | b = r / (rP + rT); |
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| 83 | m = rT / rP; |
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| 84 | Q = (1.0 - b)/n; |
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| 85 | S = Q * Q; |
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| 86 | T = S * Q; |
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| 87 | R = std::sqrt(m*n); |
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| 88 | U = 1.0/m - 2.0; |
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| 89 | // |
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| 90 | // |
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| 91 | // Initialise the threshold radius-ratio at which interactions are considered |
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| 92 | // peripheral or central. |
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| 93 | // |
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| 94 | rth = 2.0/3.0; |
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| 95 | B = 10.0 * MeV; |
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| 96 | } |
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| 97 | //////////////////////////////////////////////////////////////////////////////// |
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| 98 | // |
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| 99 | G4NuclearAbrasionGeometry::~G4NuclearAbrasionGeometry () |
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| 100 | {;} |
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| 101 | //////////////////////////////////////////////////////////////////////////////// |
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| 102 | // |
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| 103 | void G4NuclearAbrasionGeometry::SetPeripheralThreshold (G4double rth1) |
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| 104 | {if (rth1 > 0.0 && rth1 <= 1.0) rth = rth1;} |
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| 105 | //////////////////////////////////////////////////////////////////////////////// |
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| 106 | // |
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| 107 | G4double G4NuclearAbrasionGeometry::GetPeripheralThreshold () |
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| 108 | {return rth;} |
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| 109 | //////////////////////////////////////////////////////////////////////////////// |
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| 110 | // |
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| 111 | G4double G4NuclearAbrasionGeometry::P () |
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| 112 | { |
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| 113 | // |
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| 114 | // |
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| 115 | // Initialise the value for P, then determine the actual value depending upon |
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| 116 | // whether the projectile is larger or smaller than the target and these radii |
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| 117 | // in relation to the impact parameter. |
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| 118 | // |
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| 119 | G4double P = 0.0; |
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| 120 | |
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| 121 | if (rT > rP) |
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| 122 | { |
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| 123 | if (rT-rP<=r && r<=rT+rP) P = 0.125*R*U*S - 0.125*(0.5*R*U+1.0)*T; |
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| 124 | else P = -1.0; |
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| 125 | } |
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| 126 | else |
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| 127 | { |
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| 128 | if (rP-rT<=r && r<=rP+rT) P = 0.125*R*U*S - 0.125*(0.5*std::sqrt(n/m)*U- |
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| 129 | (std::sqrt(1.0-m*m)/n - 1.0)*std::sqrt((2.0-m)/std::pow(m,5.0)))*T; |
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| 130 | else P = (std::sqrt(1.0-m*m)/n-1.0)*std::sqrt(1.0-b*b/n/n); |
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| 131 | } |
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| 132 | |
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| 133 | if (!(P <= 1.0 && P>= -1.0)) |
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| 134 | { |
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| 135 | if (P > 1.0) P = 1.0; |
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| 136 | else P = -1.0; |
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| 137 | } |
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| 138 | return P; |
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| 139 | } |
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| 140 | //////////////////////////////////////////////////////////////////////////////// |
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| 141 | // |
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| 142 | G4double G4NuclearAbrasionGeometry::F () |
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| 143 | { |
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| 144 | // |
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| 145 | // |
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| 146 | // Initialise the value for F, then determine the actual value depending upon |
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| 147 | // whether the projectile is larger or smaller than the target and these radii |
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| 148 | // in relation to the impact parameter. |
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| 149 | // |
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| 150 | G4double F = 0.0; |
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| 151 | |
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| 152 | if (rT > rP) |
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| 153 | { |
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| 154 | if (rT-rP<=r && r<=rT+rP) F = 0.75*R*S - 0.125*(3.0*R-1.0)*T; |
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| 155 | else F = 1.0; |
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| 156 | } |
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| 157 | else |
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| 158 | { |
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| 159 | if (rP-rT<=r && r<=rP+rT) F = 0.75*R*S - 0.125*(3.0*std::sqrt(n/m)- |
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| 160 | (1.0-std::pow(1.0-m*m,3.0/2.0))*std::sqrt(1.0-std::pow(1.0-m,2.0))/std::pow(m,3.0))*T; |
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| 161 | else F = (1.0-std::pow(1.0-m*m,3.0/2.0))*std::sqrt(1.0-b*b/n/n); |
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| 162 | } |
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| 163 | |
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| 164 | if (!(F <= 1.0 && F>= 0.0)) |
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| 165 | { |
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| 166 | if (F > 1.0) F = 1.0; |
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| 167 | else F = 0.0; |
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| 168 | } |
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| 169 | return F; |
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| 170 | } |
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| 171 | //////////////////////////////////////////////////////////////////////////////// |
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| 172 | // |
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| 173 | G4double G4NuclearAbrasionGeometry::GetExcitationEnergyOfProjectile () |
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| 174 | { |
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| 175 | G4double F1 = F(); |
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| 176 | G4double P1 = P(); |
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| 177 | G4double Es = 0.0; |
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| 178 | |
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| 179 | Es = 0.95 * MeV * 4.0 * pi * rP*rP/fermi/fermi * |
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| 180 | (1.0+P1-std::pow(1.0-F1,2.0/3.0)); |
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| 181 | // if (rT < rP && r < rP-rT) |
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| 182 | if ((r-rP)/rT < rth) |
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| 183 | { |
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| 184 | G4double omega = 0.0; |
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| 185 | if (AP < 12.0) omega = 1500.0; |
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| 186 | else if (AP <= 16.0) omega = 1500.0 - 320.0*(AP-12.0); |
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| 187 | Es *= 1.0 + F1*(5.0+omega*F1*F1); |
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| 188 | } |
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| 189 | |
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| 190 | if (Es < 0.0) |
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| 191 | Es = 0.0; |
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| 192 | else if (Es > B * AP) |
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| 193 | Es = B * AP; |
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| 194 | return Es; |
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| 195 | } |
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[1347] | 196 | |
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| 197 | |
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[819] | 198 | G4double G4NuclearAbrasionGeometry::GetExcitationEnergyOfTarget () |
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| 199 | { |
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[1347] | 200 | // This member function declares a new G4NuclearAbrasionGeometry object |
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| 201 | // but with the projectile and target exchanged to determine the values |
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| 202 | // for F and P. Determination of the excess surface area and excitation |
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| 203 | // energy is as above. |
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| 204 | |
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| 205 | G4NuclearAbrasionGeometry* revAbrasionGeometry = |
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[819] | 206 | new G4NuclearAbrasionGeometry(AT, AP, r); |
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| 207 | G4double F1 = revAbrasionGeometry->F(); |
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| 208 | G4double P1 = revAbrasionGeometry->P(); |
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| 209 | G4double Es = 0.0; |
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| 210 | |
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| 211 | Es = 0.95 * MeV * 4.0 * pi * rT*rT/fermi/fermi * |
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| 212 | (1.0+P1-std::pow(1.0-F1,2.0/3.0)); |
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[1347] | 213 | |
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[819] | 214 | // if (rP < rT && r < rT-rP) |
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[1347] | 215 | if ((r-rT)/rP < rth) { |
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[819] | 216 | G4double omega = 0.0; |
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| 217 | if (AT < 12.0) omega = 1500.0; |
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| 218 | else if (AT <= 16.0) omega = 1500.0 - 320.0*(AT-12.0); |
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| 219 | Es *= 1.0 + F1*(5.0+omega*F1*F1); |
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| 220 | } |
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| 221 | |
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| 222 | if (Es < 0.0) |
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| 223 | Es = 0.0; |
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| 224 | else if (Es > B * AT) |
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| 225 | Es = B * AT; |
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[1347] | 226 | |
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| 227 | delete revAbrasionGeometry; |
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| 228 | |
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[819] | 229 | return Es; |
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| 230 | } |
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