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G4StatMFMacroChemicalPotential.cc
Go to the documentation of this file.
Or view
the newest version in sPHENIX GitHub for file G4StatMFMacroChemicalPotential.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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//
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// Hadronic Process: Nuclear De-excitations
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// by V. Lara
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#include "
G4StatMFMacroChemicalPotential.hh
"
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#include "
G4PhysicalConstants.hh
"
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#include "
G4Pow.hh
"
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// operators definitions
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G4StatMFMacroChemicalPotential
&
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G4StatMFMacroChemicalPotential::operator=
(
const
G4StatMFMacroChemicalPotential
& )
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{
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throw
G4HadronicException
(__FILE__, __LINE__,
"G4StatMFMacroChemicalPotential::operator= meant to not be accessable"
);
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return
*
this
;
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}
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G4bool
G4StatMFMacroChemicalPotential::operator==
(
const
G4StatMFMacroChemicalPotential
& )
const
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{
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throw
G4HadronicException
(__FILE__, __LINE__,
"G4StatMFMacroChemicalPotential::operator== meant to not be accessable"
);
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return
false
;
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}
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G4bool
G4StatMFMacroChemicalPotential::operator!=
(
const
G4StatMFMacroChemicalPotential
& )
const
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{
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throw
G4HadronicException
(__FILE__, __LINE__,
"G4StatMFMacroChemicalPotential::operator!= meant to not be accessable"
);
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return
true
;
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}
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G4double
G4StatMFMacroChemicalPotential::CalcChemicalPotentialNu
(
void
)
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// Calculate Chemical potential \nu
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{
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G4Pow
* g4calc =
G4Pow::GetInstance
();
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G4double
CP =
G4StatMFParameters::GetCoulomb
();
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// Initial value for _ChemPotentialNu
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_ChemPotentialNu
= (
theZ
/
theA
)*(8.0*
G4StatMFParameters::GetGamma0
()
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+2.0*CP*g4calc->
Z23
(
theA
))
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- 4.0*
G4StatMFParameters::GetGamma0
();
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G4double
ChemPa =
_ChemPotentialNu
;
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G4double
ChemPb = 0.5*
_ChemPotentialNu
;
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G4double
fChemPa = this->
operator()
(ChemPa);
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G4double
fChemPb = this->
operator()
(ChemPb);
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if
(fChemPa*fChemPb > 0.0) {
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// bracketing the solution
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if
(fChemPa < 0.0) {
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do
{
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ChemPb -= 1.5*
std::abs
(ChemPb-ChemPa);
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fChemPb = this->
operator()
(ChemPb);
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// Loop checking, 05-Aug-2015, Vladimir Ivanchenko
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}
while
(fChemPb < 0.0);
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}
else
{
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do
{
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ChemPb += 1.5*
std::abs
(ChemPb-ChemPa);
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fChemPb = this->
operator()
(ChemPb);
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// Loop checking, 05-Aug-2015, Vladimir Ivanchenko
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}
while
(fChemPb > 0.0);
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}
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}
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G4Solver<G4StatMFMacroChemicalPotential>
* theSolver =
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new
G4Solver<G4StatMFMacroChemicalPotential>
(100,1.e-4);
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theSolver->
SetIntervalLimits
(ChemPa,ChemPb);
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// if (!theSolver->Crenshaw(*this))
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if
(!theSolver->
Brent
(*
this
)){
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G4cout
<<
"G4StatMFMacroChemicalPotential:"
<<
" ChemPa="
<<ChemPa
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<<
" ChemPb="
<<ChemPb<<
G4endl
;
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G4cout
<<
"G4StatMFMacroChemicalPotential:"
<<
" fChemPa="
<<fChemPa
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<<
" fChemPb="
<<fChemPb<<
G4endl
;
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throw
G4HadronicException
(__FILE__, __LINE__,
"G4StatMFMacroChemicalPotential::CalcChemicalPotentialNu: I couldn't find the root."
);
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}
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_ChemPotentialNu
= theSolver->
GetRoot
();
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delete
theSolver;
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return
_ChemPotentialNu
;
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}
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G4double
G4StatMFMacroChemicalPotential::CalcMeanZ
(
const
G4double
nu)
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{
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std::vector<G4VStatMFMacroCluster*>::iterator i;
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for
(i=
_theClusters
->begin()+1; i !=
_theClusters
->end(); ++i)
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{
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(*i)->CalcZARatio(nu);
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}
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CalcChemicalPotentialMu
(nu);
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// This is important, the Z over A ratio for proton and neutron depends on the
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// chemical potential Mu, while for the first guess for Chemical potential mu
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// some values of Z over A ratio. This is the reason for that.
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(*
_theClusters
->begin())->CalcZARatio(nu);
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G4double
MeanZ = 0.0;
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G4int
n
= 1;
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for
(i =
_theClusters
->begin(); i !=
_theClusters
->end(); ++i)
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{
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MeanZ += (n++) * (*i)->GetZARatio() * (*i)->GetMeanMultiplicity();
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}
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return
MeanZ;
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}
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void
G4StatMFMacroChemicalPotential::CalcChemicalPotentialMu
(
const
G4double
nu)
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// Calculate Chemical potential \mu
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// For that is necesary to calculate mean multiplicities
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{
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G4StatMFMacroMultiplicity
* theMultip =
new
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G4StatMFMacroMultiplicity
(
theA
,
_Kappa
,
_MeanTemperature
,nu,
_theClusters
);
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_ChemPotentialMu
= theMultip->
CalcChemicalPotentialMu
();
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_MeanMultiplicity
= theMultip->
GetMeanMultiplicity
();
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delete
theMultip;
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return
;
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}
geant4
tree
geant4-10.6-release
source
processes
hadronic
models
de_excitation
multifragmentation
src
G4StatMFMacroChemicalPotential.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:42
using
1.8.2 with
ECCE GitHub integration