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 | // $Id: bindingEnergyAsymptotic.cc,v 1.11 2010/04/08 15:48:00 mkelsey Exp $ |
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26 | // Geant4 tag: $Name: geant4-09-04-beta-cand-01 $ |
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27 | // |
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28 | // 20100202 M. Kelsey -- Eliminate unnecessary use of std::pow() |
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29 | |
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30 | #include "G4InuclSpecialFunctions.hh" |
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31 | |
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32 | G4double G4InuclSpecialFunctions::bindingEnergyAsymptotic(G4double A, |
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33 | G4double Z) { |
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34 | G4int verboseLevel = 2; |
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35 | |
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36 | if (verboseLevel > 3) { |
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37 | G4cout << " >>> G4InuclSpecialFunctions::bindingEnergyAsymptotic" << G4endl; |
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38 | } |
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39 | |
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40 | // calculates the nuclei binding energy |
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41 | // using smooth liquid high energy formula |
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42 | G4double X = (1.0 - 2.0 * Z / A) * (1.0 - 2.0 * Z / A); |
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43 | G4double X1 = G4cbrt(A); |
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44 | G4double X2 = X1 * X1; |
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45 | G4double X3 = 1.0 / X1; |
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46 | G4double X4 = 1.0 / X2; |
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47 | G4double DM = 17.035 * (1.0 - 1.846 * X) * A - |
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48 | 25.8357 * (1.0 - 1.712 * X) * X2 * |
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49 | ((1.0 -0.62025 * X4) * (1.0 - 0.62025 * X4)) - |
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50 | 0.779 * Z * (Z - 1.0) * X3 * |
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51 | (1.0 - 1.5849 * X4 + 1.2273 / A + 1.5772 * X4 * X4) + |
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52 | 0.4328 * G4cbrt(Z*Z*Z*Z) * X3 * |
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53 | (1.0 - 0.57811 * X3 - 0.14518 * X4 + 0.496 / A); |
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54 | |
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55 | return DM; |
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56 | } |
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