Gabriele Cosmo
61 lines
2.7 KiB
C++
61 lines
2.7 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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#include "G4NuclearShellModelDensity.hh"
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#include "G4PhysicalConstants.hh"
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#include "G4SystemOfUnits.hh"
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#include "G4Exp.hh"
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#include "G4Log.hh"
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#include "G4Pow.hh"
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G4NuclearShellModelDensity::G4NuclearShellModelDensity(G4int anA, G4int /*aZ*/)
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: theA(anA)//, theZ(aZ)
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{
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const G4double r0sq=0.8133*fermi*fermi;
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theRsquare= r0sq * G4Pow::GetInstance()->Z23(theA);
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G4double x = 1./(pi*theRsquare);
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Setrho0(x*std::sqrt(x));
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}
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G4NuclearShellModelDensity::~G4NuclearShellModelDensity() {}
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G4double G4NuclearShellModelDensity::GetRelativeDensity(const G4ThreeVector & aPosition) const
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{
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return G4Exp(-1*aPosition.mag2()/theRsquare);
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}
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G4double G4NuclearShellModelDensity::GetRadius(const G4double maxRelativeDensity) const
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{
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return (maxRelativeDensity>0 && maxRelativeDensity <= 1 ) ?
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std::sqrt(theRsquare * G4Log(1/maxRelativeDensity) ) : DBL_MAX;
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}
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G4double G4NuclearShellModelDensity::GetDeriv(const G4ThreeVector & aPosition) const
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{
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return -2* aPosition.mag() / theRsquare * GetDensity(aPosition);
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}
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