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G4NeutronElectronElXsc.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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// Neutron-electron elastic cross section base on the integration of
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// the Rosenbluth differential xsc
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//
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// 16.05.17 V. Grichine
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//
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//
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#ifndef G4NeutronElectronElXsc_h
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#define G4NeutronElectronElXsc_h
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#include "
globals.hh
"
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#include "
G4VCrossSectionDataSet.hh
"
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#include "
G4DynamicParticle.hh
"
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// class G4ParticleDefinition;
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class
G4PhysicsLogVector
;
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class
G4PhysicsTable
;
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class
G4NeutronElectronElXsc
:
public
G4VCrossSectionDataSet
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{
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public
:
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G4NeutronElectronElXsc
();
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~G4NeutronElectronElXsc
();
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void
Initialise
();
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virtual
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G4bool
IsElementApplicable
(
const
G4DynamicParticle
*,
G4int
Z
,
const
G4Material
*);
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virtual
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G4double
GetElementCrossSection
(
const
G4DynamicParticle
*,
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G4int
Z,
const
G4Material
*);
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G4double
GetRosenbluthXsc
(
const
G4DynamicParticle
*,
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G4int
Z,
const
G4Material
*);
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G4double
XscIntegrand
(
G4double
x
);
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G4double
GetElementNonRelXsc
(
const
G4DynamicParticle
*,
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G4int
Z,
const
G4Material
*);
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G4double
CalculateAm
(
G4double
momentum
);
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inline
G4double
GetAm
(){
return
fAm
;};
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void
SetCutEnergy
(
G4double
ec){
fCutEnergy
=ec;};
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G4double
GetCutEnergy
(){
return
fCutEnergy
;};
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void
SetBiasingFactor
(
G4double
bf){
fBiasingFactor
=bf;};
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protected
:
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G4double
fM
,
fM2
,
fMv2
,
fme
,
fme2
,
fee
,
fee2
;
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G4double
fCofXsc
;
//
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G4double
fAm
;
//
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G4int
fEnergyBin
;
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G4double
fMinEnergy
,
fMaxEnergy
,
fCutEnergy
;
// minimal recoil electron energy detected
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G4double
fBiasingFactor
;
// biasing xsc up
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G4PhysicsLogVector
*
fEnergyXscVector
;
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static
const
G4double
fXscArray
[200];
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};
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//
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// return Wentzel atom screening correction for neutron-electron scattering
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inline
G4double
G4NeutronElectronElXsc::CalculateAm
(
G4double
momentum
)
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{
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G4double
k
= momentum/
CLHEP::hbarc
;
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G4double
ch = 1.13;
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G4double
zn = 1.77*k*
CLHEP::Bohr_radius
;
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G4double
zn2 = zn*zn;
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fAm
= ch/zn2;
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return
fAm
;
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}
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//
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// Slow electron (Tkin << me_c2) in the neutron rest frame
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inline
G4double
G4NeutronElectronElXsc::
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GetElementNonRelXsc
(
const
G4DynamicParticle
* aPart,
G4int
ZZ,
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const
G4Material
*)
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{
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G4double
result(0.), te(0.),
momentum
(0.);
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te = aPart->
GetKineticEnergy
()*
fme
/
fM
;
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momentum = std::sqrt( te*(te + 2.*
fme
) );
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fAm
=
CalculateAm
(momentum);
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result = 1. + std::log(1. +1./
fAm
);
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result *=
fCofXsc
;
//*energy;
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result *= ZZ;
// incoherent sum over all element electrons
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return
result;
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}
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#endif
geant4
tree
geant4-10.6-release
source
processes
hadronic
cross_sections
include
G4NeutronElectronElXsc.hh
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:36
using
1.8.2 with
ECCE GitHub integration