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G4GNASHTransitions.cc
Go to the documentation of this file.
Or view
the newest version in sPHENIX GitHub for file G4GNASHTransitions.cc
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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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// 20.08.2010 V.Ivanchenko move constructor and destructor to the source
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#include "
G4GNASHTransitions.hh
"
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#include "
G4PhysicalConstants.hh
"
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#include "
G4SystemOfUnits.hh
"
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#include "
G4NuclearLevelData.hh
"
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#include "
G4DeexPrecoParameters.hh
"
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#include "
G4HadronicException.hh
"
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#include "
Randomize.hh
"
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G4GNASHTransitions::G4GNASHTransitions
()
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{
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theParameters
=
G4NuclearLevelData::GetInstance
()->
GetParameters
();
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}
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G4GNASHTransitions::~G4GNASHTransitions
()
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{}
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G4double
G4GNASHTransitions::
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CalculateProbability
(
const
G4Fragment
& aFragment)
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{
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static
const
G4double
k
= 135.0 *
CLHEP::MeV
*
CLHEP::MeV
*
CLHEP::MeV
;
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G4double
E
= aFragment.
GetExcitationEnergy
();
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G4double
P
= aFragment.
GetNumberOfParticles
();
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G4double
H
= aFragment.
GetNumberOfHoles
();
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G4double
N
= P + H;
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G4int
Z
= aFragment.
GetZ_asInt
();
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G4int
A
= aFragment.
GetA_asInt
();
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G4double
theMatrixElement(k*N/((A*A*A)*E));
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G4double
x
= E/(N*
CLHEP::MeV
);
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static
const
G4double
xf = std::sqrt(2.0/7.0);
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if
( x < 2.0) { x *= xf; }
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else
if
( x < 7.0) { x *= std::sqrt(x/7.0); }
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else
if
( x > 15.0){ x *= std::sqrt(15.0/x); }
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theMatrixElement *=
x
;
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G4double
gg = (6.0/
pi2
)*
G4NuclearLevelData::GetInstance
()->
GetLevelDensity
(Z,A,E);
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G4double
Epauli = ((P+1.0)*(P+1.0) + (H+1.0)*(H+1.0) + (P+1.0) - 3.0*(H-1.0))*0.25;
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G4double
Probability = gg*gg*gg *(E-Epauli)*(E-Epauli);
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Probability *= theMatrixElement/(2.0*(N+1.0)*
CLHEP::h_Planck
);
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return
Probability;
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}
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void
G4GNASHTransitions::PerformTransition
(
G4Fragment
& result)
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{
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result.
SetNumberOfParticles
(result.
GetNumberOfParticles
()+1);
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result.
SetNumberOfHoles
(result.
GetNumberOfHoles
()+1);
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if
(
G4UniformRand
()*result.
GetA_asInt
() <=
G4double
(result.
GetZ_asInt
()))
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{
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result.
SetNumberOfCharged
(result.
GetNumberOfCharged
()+1);
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}
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if
(result.
GetNumberOfParticles
() < result.
GetNumberOfCharged
())
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{
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result.
SetNumberOfCharged
(result.
GetNumberOfParticles
());
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}
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}
geant4
tree
geant4-10.6-release
source
processes
hadronic
models
pre_equilibrium
exciton_model
src
G4GNASHTransitions.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:49
using
1.8.2 with
ECCE GitHub integration