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G4NuclearFermiDensity.hh
Go to the documentation of this file.
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the newest version in sPHENIX GitHub for file G4NuclearFermiDensity.hh
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//
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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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//
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#ifndef G4NuclearFermiDensity_h
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#define G4NuclearFermiDensity_h 1
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#include "
globals.hh
"
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#include "
G4ThreeVector.hh
"
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#include "
G4VNuclearDensity.hh
"
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#include <
CLHEP/Units/PhysicalConstants.h
>
// pi, fermi,..
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#include "
G4Exp.hh
"
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#include "
G4Log.hh
"
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//#include <cmath> // pow
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class
G4NuclearFermiDensity
:
public
G4VNuclearDensity
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{
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public
:
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G4NuclearFermiDensity
(
G4int
anA,
G4int
aZ);
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~G4NuclearFermiDensity
();
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G4double
GetRelativeDensity
(
const
G4ThreeVector
& aPosition)
const
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{
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return
1./(1.+
G4Exp
((aPosition.
mag
()-
theR
)/
a
));
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}
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G4double
GetRadius
(
const
G4double
maxRelativeDenisty)
const
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{
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return
(maxRelativeDenisty>0 && maxRelativeDenisty <= 1 ) ?
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(
theR
+
a
*
G4Log
((1-maxRelativeDenisty+
G4Exp
(-1*
theR
/
a
))/maxRelativeDenisty)) :
DBL_MAX
;
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}
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G4double
GetDeriv
(
const
G4ThreeVector
& aPosition)
const
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{
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G4double
currentR=aPosition.
mag
();
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if
(currentR > 40*
theR
) {
return
0;}
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else
return
-
G4Exp
((currentR-
theR
)/
a
) *
sqr
(
GetDensity
(aPosition)) / (
a
*
Getrho0
());
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}
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private
:
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G4int
theA
;
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G4double
theR
;
// Nuclear Radius
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const
G4double
a
;
// Determines the nuclear surface thickness
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};
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#endif
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geant4
tree
geant4-10.6-release
source
processes
hadronic
models
util
include
G4NuclearFermiDensity.hh
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:51
using
1.8.2 with
ECCE GitHub integration