Geant4  10.00.p01
G4NuclearShellModelDensity.cc
Go to the documentation of this file.
1 //
2 // ********************************************************************
3 // * License and Disclaimer *
4 // * *
5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. *
10 // * *
11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitation of liability. *
17 // * *
18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Software license. *
24 // ********************************************************************
25 //
26 //
27 //
28 
30 #include "G4PhysicalConstants.hh"
31 #include "G4SystemOfUnits.hh"
32 
34 : theA(anA)//, theZ(aZ)
35 {
36  const G4double r0sq=0.8133*fermi*fermi;
37  theRsquare= r0sq * std::pow(G4double(theA), 2./3. );
38  Setrho0(std::pow(1./(pi*theRsquare),3./2.));
39 }
40 
42 
44 {
45  return std::exp(-1*aPosition.mag2()/theRsquare);
46 }
47 
49 {
50 
51  return (maxRelativeDensity>0 && maxRelativeDensity <= 1 ) ?
52  std::sqrt(theRsquare * std::log(1/maxRelativeDensity) ) : DBL_MAX;
53 }
54 
56 {
57  return -2* aPosition.mag() / theRsquare * GetDensity(aPosition);
58 }
CLHEP::Hep3Vector G4ThreeVector
G4double GetDeriv(const G4ThreeVector &aPosition) const
G4double GetRelativeDensity(const G4ThreeVector &aPosition) const
const G4double pi
void Setrho0(G4double arho0)
int G4int
Definition: G4Types.hh:78
G4NuclearShellModelDensity(G4int anA, G4int aZ)
G4double GetDensity(const G4ThreeVector &aPosition) const
G4double GetRadius(const G4double maxRelativeDenisty) const
double G4double
Definition: G4Types.hh:76
#define DBL_MAX
Definition: templates.hh:83
static const double fermi
Definition: G4SIunits.hh:93