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G4LindhardPartition.cc
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the newest version in sPHENIX GitHub for file G4LindhardPartition.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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* \file electromagnetic/TestEm7/src/G4LindhardPartition.cc
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* \brief Implementation of the G4LindhardPartition class
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*
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* Created by Marcus Mendenhall on 1/14/08.
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* 2008 Vanderbilt University, Nashville, TN, USA.
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*
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*/
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//
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#include "
G4LindhardPartition.hh
"
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#include "
G4Material.hh
"
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#include "
G4Element.hh
"
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#include "
G4PhysicalConstants.hh
"
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#include "
G4SystemOfUnits.hh
"
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/*
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for a first cut, we will compute NIEL from a Lindhard-Robinson partition
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based on the most abundant element in the material.
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this is from IEEE Trans. Nucl Science Vol. 48 No.1 February 2001 page 162++
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Insoo Jun, "Effects of Secondary Particles on the Total Dose..."
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and, by reference,
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Lindhard, Nielsen, Scharff & Thompson,
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"Integral Equations Governing Radiation Efects...",
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Mat. Fys. Medd. Dan. Vid. Selsk. vol 33 #10, pp1-42, 1963
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and
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Robinson, "The dependence of radiation effects on primary recoil energy",
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in Proc. Int. Conf. Radiation-Induced Voids in Metal,
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Albany, NY 1972 pp. 397-439
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def lindhard_robinson(z1, a1, z2, a2, ke):
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el=30.724*z1*z2*math.sqrt(z1**0.6667+z2**0.6667)*(a1+a2)/a2
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fl=0.0793*z1**0.6667*math.sqrt(z2)*(a1+a2)**1.5/
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((z1**0.6667+z2**0.6667)**0.75*a1**1.5*math.sqrt(a2))
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eps=ke*(1.0/el)
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return 1.0/(1+fl*(3.4008*eps**0.16667+0.40244*eps**0.75+eps))
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*/
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G4LindhardRobinsonPartition::G4LindhardRobinsonPartition
()
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{
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max_z
= 120;
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for
(
size_t
i=1; i<
max_z
; i++) {
z23
[i]=std::pow((
G4double
)i, 2./3.);}
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}
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G4double
G4LindhardRobinsonPartition::PartitionNIEL
(
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G4int
z1
,
G4double
a1,
const
G4Material
*
material
,
G4double
energy
)
const
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{
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size_t
nMatElements = material->
GetNumberOfElements
();
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const
G4double
*atomDensities=material->
GetVecNbOfAtomsPerVolume
();
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G4double
maxdens=0.0;
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size_t
maxindex=0;
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for
(
size_t
k
=0 ;
k
< nMatElements ;
k
++ )
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{
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if
(atomDensities[
k
] > maxdens) {
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maxdens=atomDensities[
k
];
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maxindex=
k
;
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}
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}
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const
G4Element
*element=material->
GetElement
(maxindex);
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G4int
z2
=
G4int
(element->
GetZ
());
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G4double
a2=element->
GetA
()/(
Avogadro
*
amu
);
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G4double
zpow=
z23
[
z1
]+
z23
[
z2
];
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G4double
asum=a1+a2;
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G4double
el=30.724*z1*z2*std::sqrt(zpow)*asum/a2;
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G4double
fl=0.0793*z23[
z1
]*std::sqrt(z2*asum*asum*asum/(a1*a1*a1*a2))
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/std::pow(zpow, 0.75);
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G4double
eps
=(energy/
eV
)*(1.0/el);
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return
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1.0/(1+fl*(3.4008*std::pow(eps, 0.16667)+0.40244*std::pow(eps, 0.75)+
eps
));
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}
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geant4
tree
geant4-10.6-release
examples
extended
electromagnetic
TestEm7
src
G4LindhardPartition.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:03
using
1.8.2 with
ECCE GitHub integration