00001 // 00002 // ******************************************************************** 00003 // * License and Disclaimer * 00004 // * * 00005 // * The Geant4 software is copyright of the Copyright Holders of * 00006 // * the Geant4 Collaboration. It is provided under the terms and * 00007 // * conditions of the Geant4 Software License, included in the file * 00008 // * LICENSE and available at http://cern.ch/geant4/license . These * 00009 // * include a list of copyright holders. * 00010 // * * 00011 // * Neither the authors of this software system, nor their employing * 00012 // * institutes,nor the agencies providing financial support for this * 00013 // * work make any representation or warranty, express or implied, * 00014 // * regarding this software system or assume any liability for its * 00015 // * use. Please see the license in the file LICENSE and URL above * 00016 // * for the full disclaimer and the limitation of liability. * 00017 // * * 00018 // * This code implementation is the result of the scientific and * 00019 // * technical work of the GEANT4 collaboration. * 00020 // * By using, copying, modifying or distributing the software (or * 00021 // * any work based on the software) you agree to acknowledge its * 00022 // * use in resulting scientific publications, and indicate your * 00023 // * acceptance of all terms of the Geant4 Software license. * 00024 // ******************************************************************** 00025 // 00026 // $Id$ 00027 // 00028 // Hadronic Process: Nuclear De-excitations 00029 // by V. Lara (Dec 1999) 00030 00031 00032 #include "G4ProtonCoulombBarrier.hh" 00033 00034 G4ProtonCoulombBarrier::G4ProtonCoulombBarrier() : G4CoulombBarrier(1,1) 00035 {} 00036 00037 G4ProtonCoulombBarrier::~G4ProtonCoulombBarrier() 00038 {} 00039 00040 G4double G4ProtonCoulombBarrier::BarrierPenetrationFactor(G4double aZ) const 00041 { 00042 // Data comes from 00043 // Dostrovsky, Fraenkel and Friedlander 00044 // Physical Review, vol 116, num. 3 1959 00045 // 00046 // const G4int size = 5; 00047 // const G4double Zlist[size] = {10.0, 20.0, 30.0, 50.0, 70.0}; 00048 // const G4double Kprot[size] = {0.42, 0.58, 0.68, 0.77, 0.80}; 00049 G4double K = 1.0; 00050 if (aZ>=70.0) { 00051 K = 0.80; 00052 } else { 00053 K = (((0.2357e-5*aZ) - 0.42679e-3)*aZ + 0.27035e-1)*aZ + 0.19025; 00054 } 00055 return K; 00056 }