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G4DNABornAngle.cc
Go to the documentation of this file.
Or view
the newest version in sPHENIX GitHub for file G4DNABornAngle.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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//
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// GEANT4 Class file
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//
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//
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// File name: G4DNABornAngle
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//
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// Author: Vladimir Ivantcheko
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//
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// Creation date: 23 August 2013
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//
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// Modifications:
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//
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// Class Description:
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//
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// Delta-electron Angular Distribution Generation
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//
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// Class Description: End
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//
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// -------------------------------------------------------------------
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//
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#include "
G4DNABornAngle.hh
"
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#include "
G4PhysicalConstants.hh
"
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#include "
Randomize.hh
"
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#include "
G4ParticleDefinition.hh
"
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#include "
G4Electron.hh
"
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#include "
G4SystemOfUnits.hh
"
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using namespace
std;
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G4DNABornAngle::G4DNABornAngle
(
const
G4String
&)
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:
G4VEmAngularDistribution
(
"deltaBorn"
)
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{
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fElectron
=
G4Electron::Electron
();
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}
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G4DNABornAngle::~G4DNABornAngle
()
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{}
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G4ThreeVector
&
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G4DNABornAngle::SampleDirectionForShell
(
const
G4DynamicParticle
* dp,
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G4double
secKinetic,
G4int
,
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G4int
,
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const
G4Material
*)
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{
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G4double
k
= dp->
GetKineticEnergy
();
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G4double
cosTheta = 1.0;
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if
(dp->
GetDefinition
() ==
fElectron
)
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{
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if
(secKinetic < 50.*
eV
) cosTheta = (2.*
G4UniformRand
())-1.;
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else
if
(secKinetic <= 200.*
eV
)
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{
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if
(
G4UniformRand
() <= 0.1) cosTheta = (2.*
G4UniformRand
())-1.;
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else
cosTheta =
G4UniformRand
()*(std::sqrt(2.)/2);
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}
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else
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{
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G4double
sin2O =
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(1.-secKinetic/
k
)/(1.+secKinetic/(2.*
electron_mass_c2
));
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cosTheta = std::sqrt(1.-sin2O);
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}
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}
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else
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{
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G4double
mass
= dp->
GetDefinition
()->
GetPDGMass
();
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G4double
maxSecKinetic = 4.* (
electron_mass_c2
/
mass
) * k;
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// cosTheta = std::sqrt(secKinetic / maxSecKinetic);
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// Restriction below 100 eV from Emfietzoglou (2000)
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if
(secKinetic>100*
eV
) cosTheta = std::sqrt(secKinetic / maxSecKinetic);
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else
cosTheta = (2.*
G4UniformRand
())-1.;
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}
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G4double
sint = sqrt((1.0 - cosTheta)*(1.0 + cosTheta));
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G4double
phi
=
twopi
*
G4UniformRand
();
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fLocalDirection
.
set
(sint*cos(phi), sint*sin(phi), cosTheta);
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fLocalDirection
.
rotateUz
(dp->
GetMomentumDirection
());
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return
fLocalDirection
;
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}
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G4ThreeVector
&
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G4DNABornAngle::SampleDirection
(
const
G4DynamicParticle
* dp,
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G4double
secEkin,
G4int
Z
,
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const
G4Material
*
mat
)
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{
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return
SampleDirectionForShell
(dp, secEkin, Z, 0, mat);
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}
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void
G4DNABornAngle::PrintGeneratorInformation
()
const
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{}
geant4
tree
geant4-10.6-release
source
processes
electromagnetic
dna
models
src
G4DNABornAngle.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:29
using
1.8.2 with
ECCE GitHub integration