| 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 | // $Id: bindingEnergyAsymptotic.cc,v 1.13 2010/09/14 17:51:36 mkelsey Exp $ |
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| 27 | // Geant4 tag: $Name: hadr-casc-V09-03-85 $ |
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| 28 | // |
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| 29 | // 20100202 M. Kelsey -- Eliminate unnecessary use of std::pow() |
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| 30 | // 20100914 M. Kelsey -- Migrate to integer A and Z; discard unused verbose |
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| 31 | |
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| 32 | #include "G4InuclSpecialFunctions.hh" |
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| 33 | |
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| 34 | G4double G4InuclSpecialFunctions::bindingEnergyAsymptotic(G4int A, G4int Z) { |
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| 35 | // calculates the nuclei binding energy |
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| 36 | // using smooth liquid high energy formula |
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| 37 | G4double X = (1.0 - 2.0*Z/A); X *= X; |
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| 38 | G4double X1 = G4cbrt(A); |
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| 39 | G4double X2 = X1 * X1; |
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| 40 | G4double X3 = 1.0 / X1; |
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| 41 | G4double X4 = 1.0 / X2; |
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| 42 | G4double X5 = (1.0 - 0.62025 * X4); X5 *= X5; |
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| 43 | |
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| 44 | G4double DM = 17.035 * (1.0 - 1.846 * X) * A - |
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| 45 | 25.8357 * (1.0 - 1.712 * X) * X2 * X5 - |
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| 46 | 0.779 * Z * (Z - 1) * X3 * |
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| 47 | (1.0 - 1.5849 * X4 + 1.2273 / A + 1.5772 * X4 * X4) + |
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| 48 | 0.4328 * G4cbrt(Z*Z*Z*Z) * X3 * |
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| 49 | (1.0 - 0.57811 * X3 - 0.14518 * X4 + 0.496 / A); |
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| 50 | |
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| 51 | return DM; |
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| 52 | } |
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