| [968] | 1 | //
|
|---|
| 2 | // ********************************************************************
|
|---|
| 3 | // * License and Disclaimer *
|
|---|
| 4 | // * *
|
|---|
| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
|
|---|
| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
|
|---|
| 7 | // * conditions of the Geant4 Software License, included in the file *
|
|---|
| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
|
|---|
| 9 | // * include a list of copyright holders. *
|
|---|
| 10 | // * *
|
|---|
| 11 | // * Neither the authors of this software system, nor their employing *
|
|---|
| 12 | // * institutes,nor the agencies providing financial support for this *
|
|---|
| 13 | // * work make any representation or warranty, express or implied, *
|
|---|
| 14 | // * regarding this software system or assume any liability for its *
|
|---|
| 15 | // * use. Please see the license in the file LICENSE and URL above *
|
|---|
| 16 | // * for the full disclaimer and the limitation of liability. *
|
|---|
| 17 | // * *
|
|---|
| 18 | // * This code implementation is the result of the scientific and *
|
|---|
| 19 | // * technical work of the GEANT4 collaboration. *
|
|---|
| 20 | // * By using, copying, modifying or distributing the software (or *
|
|---|
| 21 | // * any work based on the software) you agree to acknowledge its *
|
|---|
| 22 | // * use in resulting scientific publications, and indicate your *
|
|---|
| 23 | // * acceptance of all terms of the Geant4 Software license. *
|
|---|
| 24 | // ********************************************************************
|
|---|
| 25 | //
|
|---|
| 26 | //
|
|---|
| [1192] | 27 | // $Id: G4CrossSectionChargeTransferCH.cc,v 1.4 2009/06/10 13:32:36 mantero Exp $
|
|---|
| [1228] | 28 | // GEANT4 tag $Name: geant4-09-03 $
|
|---|
| [968] | 29 | //
|
|---|
| 30 | // Contact Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
|
|---|
| 31 | //
|
|---|
| 32 | // Reference: TNS Geant4-DNA paper
|
|---|
| 33 | // Reference for implementation model: NIM. 155, pp. 145-156, 1978
|
|---|
| 34 |
|
|---|
| 35 | // History:
|
|---|
| 36 | // -----------
|
|---|
| 37 | // Date Name Modification
|
|---|
| 38 | // 28 Dec 2007 M.G. Pia Created
|
|---|
| 39 | //
|
|---|
| 40 | // -------------------------------------------------------------------
|
|---|
| 41 |
|
|---|
| 42 | // Class description:
|
|---|
| 43 | // Total cross section for incident p charge transfer in hydrocarbons
|
|---|
| 44 | // Reference: K. Janev, J. G. Wang and T. Kato, NIFS-DATA (2001)
|
|---|
| 45 | // http://www-cfadc.phy.ornl.gov/astro/ps/data/
|
|---|
| 46 | // http://www-pub.iaea.org/MTCD/publications/PDF/APID-VOL10.pdf
|
|---|
| 47 | //
|
|---|
| 48 | // The fit formula is:
|
|---|
| 49 | // ln(cross section)=\sum C_i T_i(x)
|
|---|
| 50 | // x=[2ln(E)-ln(E_min)-ln(E_max)]/[ln(E_max)-ln(E_min)]
|
|---|
| 51 | // T_1(x)=1
|
|---|
| 52 | // T_2(x)=x
|
|---|
| 53 | // T_n+2(x)=2T_n+1(x)-T_n(x)
|
|---|
| 54 | //
|
|---|
| 55 | // Where cross section is given in 10^-16 cm2 and E is in keV,
|
|---|
| 56 | // E_min=1e-4 keV and E_max=1.e3 keV.
|
|---|
| 57 |
|
|---|
| 58 | // Further documentation available from http://www.ge.infn.it/geant4/
|
|---|
| 59 |
|
|---|
| 60 | // -------------------------------------------------------------------
|
|---|
| 61 |
|
|---|
| 62 |
|
|---|
| 63 | #include "G4CrossSectionChargeTransferCH.hh"
|
|---|
| 64 | #include "G4Track.hh"
|
|---|
| 65 | #include "G4DynamicParticle.hh"
|
|---|
| 66 | #include "G4Proton.hh"
|
|---|
| 67 |
|
|---|
| 68 | G4CrossSectionChargeTransferCH::G4CrossSectionChargeTransferCH()
|
|---|
| 69 | {
|
|---|
| 70 | // Default energy limits (defined for protection against anomalous behaviour only)
|
|---|
| 71 | name = "ChargeTransferCH";
|
|---|
| 72 | lowEnergyLimit = 0.1 * eV;
|
|---|
| 73 | highEnergyLimit = 1.0 * MeV;
|
|---|
| 74 |
|
|---|
| 75 | std::vector<G4double> coeff;
|
|---|
| 76 | G4String materialName;
|
|---|
| 77 |
|
|---|
| 78 | // CH
|
|---|
| 79 | materialName = "CH";
|
|---|
| 80 | coeff.push_back(-1.060468);
|
|---|
| 81 | coeff.push_back(-5.662572);
|
|---|
| 82 | coeff.push_back(-4.376450);
|
|---|
| 83 | coeff.push_back(-3.567226);
|
|---|
| 84 | coeff.push_back(-1.433069);
|
|---|
| 85 | coeff.push_back(-0.5789399);
|
|---|
| 86 | coeff.push_back(-0.3523295);
|
|---|
| 87 | coeff.push_back(-0.09956988);
|
|---|
| 88 | coeff.push_back(0.01532751);
|
|---|
| 89 | crossMap[materialName] = coeff;
|
|---|
| 90 | coeff.clear();
|
|---|
| 91 |
|
|---|
| 92 | // CH2
|
|---|
| 93 | materialName = "CH2";
|
|---|
| 94 | coeff.push_back(1.118652E-01);
|
|---|
| 95 | coeff.push_back(-5.216803E+00);
|
|---|
| 96 | coeff.push_back(-3.893841E+00);
|
|---|
| 97 | coeff.push_back(-2.756865E+00);
|
|---|
| 98 | coeff.push_back(-1.192043E+00);
|
|---|
| 99 | coeff.push_back(-5.200059E-01);
|
|---|
| 100 | coeff.push_back(-1.816781E-01);
|
|---|
| 101 | coeff.push_back(1.129866E-02);
|
|---|
| 102 | coeff.push_back(-3.658702E-03);
|
|---|
| 103 | crossMap[materialName] = coeff;
|
|---|
| 104 | coeff.clear();
|
|---|
| 105 |
|
|---|
| 106 | // CH3
|
|---|
| 107 | coeff.push_back(6.854778E-01);
|
|---|
| 108 | coeff.push_back(-5.810741E+00);
|
|---|
| 109 | coeff.push_back(-3.622136E+00);
|
|---|
| 110 | coeff.push_back(-2.179920E+00);
|
|---|
| 111 | coeff.push_back(-7.801006E-01);
|
|---|
| 112 | coeff.push_back(-2.421371E-02);
|
|---|
| 113 | coeff.push_back(2.762333E-01);
|
|---|
| 114 | coeff.push_back(2.288237E-01);
|
|---|
| 115 | coeff.push_back(6.164797E-02);
|
|---|
| 116 | crossMap[materialName] = coeff;
|
|---|
| 117 | coeff.clear();
|
|---|
| 118 |
|
|---|
| 119 | // CH4
|
|---|
| 120 | materialName = "CH4";
|
|---|
| 121 | coeff.push_back(0.3901564);
|
|---|
| 122 | coeff.push_back(-6.426675);
|
|---|
| 123 | coeff.push_back(-3.706893);
|
|---|
| 124 | coeff.push_back(-1.999034);
|
|---|
| 125 | coeff.push_back(-0.5625439);
|
|---|
| 126 | coeff.push_back(0.2279431);
|
|---|
| 127 | coeff.push_back(0.3443980);
|
|---|
| 128 | coeff.push_back(0.1566892);
|
|---|
| 129 | coeff.push_back(-0.05398410);
|
|---|
| 130 | coeff.push_back(-0.1822252);
|
|---|
| 131 | coeff.push_back(-0.1593352);
|
|---|
| 132 | coeff.push_back(-0.08826322);
|
|---|
| 133 | crossMap[materialName] = coeff;
|
|---|
| 134 | coeff.clear();
|
|---|
| 135 |
|
|---|
| 136 | // C2H
|
|---|
| 137 | materialName = "C2H";
|
|---|
| 138 | coeff.push_back(-1.986507E+00);
|
|---|
| 139 | coeff.push_back(-5.720283E+00);
|
|---|
| 140 | coeff.push_back(-3.535139E+00);
|
|---|
| 141 | coeff.push_back(-4.230273E+00);
|
|---|
| 142 | coeff.push_back(-1.254502E+00);
|
|---|
| 143 | coeff.push_back(-2.056898E-01);
|
|---|
| 144 | coeff.push_back(-4.595756E-01);
|
|---|
| 145 | coeff.push_back(-7.842824E-02);
|
|---|
| 146 | coeff.push_back(3.002537E-02);
|
|---|
| 147 | coeff.push_back(-5.626713E-02);
|
|---|
| 148 | coeff.push_back(6.455583E-02);
|
|---|
| 149 | crossMap[materialName] = coeff;
|
|---|
| 150 | coeff.clear();
|
|---|
| 151 |
|
|---|
| 152 | // C2H2
|
|---|
| 153 | materialName = "C2H2";
|
|---|
| 154 | coeff.push_back(2.513870E-01);
|
|---|
| 155 | coeff.push_back(-5.812705E+00);
|
|---|
| 156 | coeff.push_back(-3.338185E+00);
|
|---|
| 157 | coeff.push_back(-3.071630E+00);
|
|---|
| 158 | coeff.push_back(-1.433263E+00);
|
|---|
| 159 | coeff.push_back(-3.583544E-01);
|
|---|
| 160 | coeff.push_back(-1.456216E-01);
|
|---|
| 161 | coeff.push_back(-7.391778E-03);
|
|---|
| 162 | coeff.push_back(1.151712E-02);
|
|---|
| 163 | crossMap[materialName] = coeff;
|
|---|
| 164 | coeff.clear();
|
|---|
| 165 | //
|
|---|
| 166 |
|
|---|
| 167 | }
|
|---|
| 168 |
|
|---|
| 169 |
|
|---|
| 170 | G4CrossSectionChargeTransferCH::~G4CrossSectionChargeTransferCH()
|
|---|
| 171 | { }
|
|---|
| 172 |
|
|---|
| 173 |
|
|---|
| 174 | G4double G4CrossSectionChargeTransferCH::CrossSection(const G4Track& track)
|
|---|
| 175 | {
|
|---|
| 176 | G4double sigma = DBL_MIN;
|
|---|
| 177 |
|
|---|
| 178 | const G4DynamicParticle* particle = track.GetDynamicParticle();
|
|---|
| 179 | G4double e = particle->GetKineticEnergy() / keV;
|
|---|
| 180 |
|
|---|
| 181 | // Get the material the track is in
|
|---|
| 182 | G4Material* material = track.GetMaterial();
|
|---|
| 183 | G4String materialName;
|
|---|
| 184 | materialName = material->GetName();
|
|---|
| 185 |
|
|---|
| 186 | // Check whether cross section data are available for the current material
|
|---|
| 187 |
|
|---|
| 188 | std::map<G4String,std::vector<G4double>,std::less<G4String> >::const_iterator pos;
|
|---|
| 189 | pos = crossMap.find(materialName);
|
|---|
| 190 | if (pos!= crossMap.end())
|
|---|
| 191 | {
|
|---|
| 192 | std::vector<G4double> coeff = (*pos).second;
|
|---|
| 193 | G4double eMin = lowEnergyLimit / keV;
|
|---|
| 194 | G4double eMax = highEnergyLimit / keV;
|
|---|
| 195 | G4double scaleFactor = 1.e-16 * cm2;
|
|---|
| 196 |
|
|---|
| 197 | if (e >= eMin && e <= eMax)
|
|---|
| 198 | {
|
|---|
| 199 | G4double x = (2.*std::log(e) - std::log(eMin) - std::log(eMax)) / (std::log(eMax) - std::log(eMin));
|
|---|
| 200 |
|
|---|
| 201 | std::vector<G4double> t;
|
|---|
| 202 | t.push_back(1.);
|
|---|
| 203 | t.push_back(x);
|
|---|
| 204 | G4double cross = t[0] * coeff[0] + t[1] * coeff[1];
|
|---|
| 205 |
|
|---|
| 206 | G4int nCoeff = coeff.size();
|
|---|
| 207 | for (G4int i=2; i<nCoeff; i++)
|
|---|
| 208 | {
|
|---|
| 209 | G4double tNext = 2. * t[i-1] - t[i-2];
|
|---|
| 210 | t.push_back(tNext);
|
|---|
| 211 | cross = cross + coeff[i] * tNext;
|
|---|
| 212 | }
|
|---|
| 213 | sigma = std::exp(cross) * scaleFactor;
|
|---|
| 214 | }
|
|---|
| 215 | }
|
|---|
| 216 |
|
|---|
| 217 | return sigma;
|
|---|
| 218 | }
|
|---|
| 219 |
|
|---|
