| 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 | //
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| 28 |
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| 29 | #include "G4NuclearShellModelDensity.hh"
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| 30 |
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| 31 | G4NuclearShellModelDensity::G4NuclearShellModelDensity(G4double anA, G4double aZ)
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| 32 | {
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| 33 | const G4double r0sq=0.8133*fermi*fermi;
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| 34 | theA = G4int(anA);
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| 35 | theZ = G4int(aZ);
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| 36 | theRsquare= r0sq * std::pow(G4double(theA), 2./3. );
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| 37 | Setrho0(std::pow(1./(pi*theRsquare),3./2.));
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| 38 | }
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| 39 |
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| 40 | G4NuclearShellModelDensity::~G4NuclearShellModelDensity() {}
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| 41 |
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| 42 | G4double G4NuclearShellModelDensity::GetRelativeDensity(const G4ThreeVector & aPosition) const
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| 43 | {
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| 44 | return std::exp(-1*aPosition.mag2()/theRsquare);
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| 45 | }
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| 46 |
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| 47 | G4double G4NuclearShellModelDensity::GetRadius(const G4double maxRelativeDensity) const
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| 48 | {
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| 49 |
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| 50 | return (maxRelativeDensity>0 && maxRelativeDensity <= 1 ) ?
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| 51 | std::sqrt(theRsquare * std::log(1/maxRelativeDensity) ) : DBL_MAX;
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| 52 | }
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| 53 |
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| 54 | G4double G4NuclearShellModelDensity::GetDeriv(const G4ThreeVector & aPosition) const
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| 55 | {
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| 56 | return -2* aPosition.mag() / theRsquare * GetDensity(aPosition);
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| 57 | }
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