[1197] | 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 G4AlphaCoulombBarrier |
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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 G4AlphaGEMCoulombBarrier_h |
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| 33 | #define G4AlphaGEMCoulombBarrier_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 G4AlphaGEMCoulombBarrier : public G4GEMCoulombBarrier |
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| 39 | { |
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| 40 | public: |
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| 41 | G4AlphaGEMCoulombBarrier() : G4GEMCoulombBarrier(4,2) {}; |
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| 42 | ~G4AlphaGEMCoulombBarrier() {}; |
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| 43 | |
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| 44 | private: |
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| 45 | G4AlphaGEMCoulombBarrier(const G4AlphaGEMCoulombBarrier & right); |
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| 46 | |
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| 47 | const G4AlphaGEMCoulombBarrier & operator=(const G4AlphaGEMCoulombBarrier & right); |
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| 48 | G4bool operator==(const G4AlphaGEMCoulombBarrier & right) const; |
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| 49 | G4bool operator!=(const G4AlphaGEMCoulombBarrier & 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; |
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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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