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 | // J. M. Quesada (July 2009) based on G4He3CoulombBarrier |
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28 | // Coded strictly according to Furihata's GEM paper |
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29 | // |
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30 | |
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31 | |
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32 | #ifndef G4He3GEMCoulombBarrier_h |
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33 | #define G4He3GEMCoulombBarrier_h 1 |
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34 | |
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35 | #include "G4GEMCoulombBarrier.hh" |
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36 | #include "globals.hh" |
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37 | |
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38 | class G4He3GEMCoulombBarrier : public G4GEMCoulombBarrier |
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39 | { |
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40 | public: |
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41 | G4He3GEMCoulombBarrier() : G4GEMCoulombBarrier(3,2) {} |
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42 | ~G4He3GEMCoulombBarrier() {} |
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43 | |
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44 | private: |
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45 | G4He3GEMCoulombBarrier(const G4He3GEMCoulombBarrier & right); |
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46 | |
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47 | const G4He3GEMCoulombBarrier & operator=(const G4He3GEMCoulombBarrier & right); |
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48 | G4bool operator==(const G4He3GEMCoulombBarrier & right) const; |
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49 | G4bool operator!=(const G4He3GEMCoulombBarrier & right) const; |
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50 | |
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51 | private: |
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52 | G4double BarrierPenetrationFactor(const G4double aZ) const |
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53 | { |
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54 | // Data comes from |
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55 | // Dostrovsky, Fraenkel and Friedlander |
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56 | // Physical Review, vol 116, num. 3 1959 |
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57 | // (JMQ 190709: according to notes added on proof) |
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58 | // dataKa = {{20, 0.81}, {30, 0.85}, {40, 0.89}, {50, 0.93}}; |
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59 | // |
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60 | G4double K = 1.0; |
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61 | if (aZ >= 50){ |
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62 | K=0.93; |
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63 | } else if (aZ <= 20) { |
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64 | K=0.81; |
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65 | } else K=0.729802+0.00402544*aZ-1.17276*1e-6*aZ*aZ+2.31248*1e-8*aZ*aZ*aZ-1.65177*1e-10*aZ*aZ*aZ*aZ; |
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66 | return K-0.06; |
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67 | } |
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68 | }; |
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69 | |
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70 | #endif |
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