Geant4
v4-10.4-release
메인 페이지
관련된 페이지
모듈
네임스페이스
클래스
파일들
파일 목록
파일 멤버
모두
클래스
네임스페이스들
파일들
함수
변수
타입정의
열거형 타입
열거형 멤버
Friends
매크로
그룹들
페이지들
source
processes
cuts
src
G4RToEConvForPositron.cc
이 파일의 문서화 페이지로 가기
1
//
2
// ********************************************************************
3
// * License and Disclaimer *
4
// * *
5
// * The Geant4 software is copyright of the Copyright Holders of *
6
// * the Geant4 Collaboration. It is provided under the terms and *
7
// * conditions of the Geant4 Software License, included in the file *
8
// * LICENSE and available at http://cern.ch/geant4/license . These *
9
// * include a list of copyright holders. *
10
// * *
11
// * Neither the authors of this software system, nor their employing *
12
// * institutes,nor the agencies providing financial support for this *
13
// * work make any representation or warranty, express or implied, *
14
// * regarding this software system or assume any liability for its *
15
// * use. Please see the license in the file LICENSE and URL above *
16
// * for the full disclaimer and the limitation of liability. *
17
// * *
18
// * This code implementation is the result of the scientific and *
19
// * technical work of the GEANT4 collaboration. *
20
// * By using, copying, modifying or distributing the software (or *
21
// * any work based on the software) you agree to acknowledge its *
22
// * use in resulting scientific publications, and indicate your *
23
// * acceptance of all terms of the Geant4 Software license. *
24
// ********************************************************************
25
//
26
//
27
// $Id: G4RToEConvForPositron.cc 70745 2013-06-05 10:54:00Z gcosmo $
28
//
29
//
30
// --------------------------------------------------------------
31
// GEANT 4 class implementation file/ History:
32
// 5 Oct. 2002, H.Kuirashige : Structure created based on object model
33
// --------------------------------------------------------------
34
35
#include "
G4RToEConvForPositron.hh
"
36
#include "
G4ParticleDefinition.hh
"
37
#include "
G4ParticleTable.hh
"
38
#include "
G4Material.hh
"
39
#include "
G4PhysicsLogVector.hh
"
40
41
#include "
G4ios.hh
"
42
#include "
G4PhysicalConstants.hh
"
43
#include "
G4SystemOfUnits.hh
"
44
45
G4RToEConvForPositron::G4RToEConvForPositron
()
46
:
G4VRangeToEnergyConverter
(),
47
Mass(0.0),
48
Z
(-1.),
49
taul(0.0),
50
ionpot(0.0),
51
ionpotlog(-1.0
e
-10),
52
bremfactor(0.1)
53
{
54
theParticle
=
G4ParticleTable::GetParticleTable
()->
FindParticle
(
"e+"
);
55
if
(
theParticle
==0) {
56
#ifdef G4VERBOSE
57
if
(
GetVerboseLevel
()>0) {
58
G4cout
<<
" G4RToEConvForPositron::G4RToEConvForPositron() "
;
59
G4cout
<<
" Positron is not defined !!"
<<
G4endl
;
60
}
61
#endif
62
}
else
{
63
Mass
=
theParticle
->
GetPDGMass
();
64
}
65
}
66
67
G4RToEConvForPositron::~G4RToEConvForPositron
()
68
{
69
}
70
71
72
73
74
// **********************************************************************
75
// ************************* ComputeLoss ********************************
76
// **********************************************************************
77
G4double
G4RToEConvForPositron::ComputeLoss
(
G4double
AtomicNumber,
78
G4double
KineticEnergy)
79
{
80
const
G4double
cbr1=0.02, cbr2=-5.7e-5, cbr3=1., cbr4=0.072;
81
const
G4double
Tlow=10.*
keV
, Thigh=1.*
GeV
;
82
83
// calculate dE/dx for electrons
84
if
( std::fabs(AtomicNumber-
Z
)>0.1 ) {
85
Z
= AtomicNumber;
86
taul
= Tlow/
Mass
;
87
ionpot
= 1.6e-5*
MeV
*std::exp(0.9*std::log(
Z
))/
Mass
;
88
ionpotlog
= std::log(
ionpot
);
89
}
90
91
G4double
tau = KineticEnergy/
Mass
;
92
G4double
dEdx;
93
94
if
(tau<
taul
)
95
{
96
G4double
t1
=
taul
+1.;
97
G4double
t2
=
taul
+2.;
98
G4double
tsq =
taul
*
taul
;
99
G4double
beta2 = taul*t2/(t1*
t1
);
100
G4double
f
= 2.*std::log(taul)
101
-(6.*taul+1.5*tsq-taul*(1.-tsq/3.)/t2-tsq*(0.5-tsq/12.)/
102
(t2*
t2
))/(t1*
t1
);
103
dEdx = (std::log(2.*taul+4.)-2.*
ionpotlog
+
f
)/beta2;
104
dEdx =
twopi_mc2_rcl2
*
Z
*dEdx;
105
G4double
clow = dEdx*std::sqrt(taul);
106
dEdx = clow/std::sqrt(KineticEnergy/
Mass
);
107
108
}
else
{
109
G4double
t1
= tau+1.;
110
G4double
t2
= tau+2.;
111
G4double
tsq = tau*tau;
112
G4double
beta2 = tau*t2/(t1*
t1
);
113
G4double
f
= 2.*std::log(tau)
114
- (6.*tau+1.5*tsq-tau*(1.-tsq/3.)/t2-tsq*(0.5-tsq/12.)/
115
(t2*
t2
))/(t1*
t1
);
116
dEdx = (std::log(2.*tau+4.)-2.*
ionpotlog
+
f
)/beta2;
117
dEdx =
twopi_mc2_rcl2
*
Z
*dEdx;
118
119
// loss from bremsstrahlung follows
120
G4double
cbrem = (cbr1+cbr2*
Z
)
121
*(cbr3+cbr4*std::log(KineticEnergy/Thigh));
122
cbrem =
Z
*(
Z
+1.)*cbrem*tau/beta2;
123
cbrem *=
bremfactor
;
124
dEdx +=
twopi_mc2_rcl2
*cbrem;
125
}
126
return
dEdx;
127
}
128
129
G4ParticleTable::FindParticle
G4ParticleDefinition * FindParticle(G4int PDGEncoding)
Definition:
G4ParticleTable.cc:577
G4PhysicalConstants.hh
t1
TTree * t1
Definition:
plottest35.C:26
G4ParticleTable::GetParticleTable
static G4ParticleTable * GetParticleTable()
Definition:
G4ParticleTable.cc:105
MeV
static constexpr double MeV
Definition:
G4SIunits.hh:214
G4Material.hh
G4RToEConvForPositron::Z
G4double Z
Definition:
G4RToEConvForPositron.hh:68
keV
static constexpr double keV
Definition:
G4SIunits.hh:216
CLHEP::twopi_mc2_rcl2
static constexpr double twopi_mc2_rcl2
Definition:
PhysicalConstants.h:105
G4ios.hh
G4endl
#define G4endl
Definition:
G4ios.hh:61
G4ParticleDefinition::GetPDGMass
G4double GetPDGMass() const
Definition:
G4ParticleDefinition.hh:123
G4RToEConvForPositron::bremfactor
G4double bremfactor
Definition:
G4RToEConvForPositron.hh:72
G4RToEConvForPositron::Mass
G4double Mass
Definition:
G4RToEConvForPositron.hh:67
Z
Float_t Z
Definition:
advanced/microbeam/plot.C:38
f
TFile f
Definition:
advanced/amsEcal/showers/plotHisto.C:6
G4double
double G4double
Definition:
G4Types.hh:76
G4VRangeToEnergyConverter
Definition:
G4VRangeToEnergyConverter.hh:58
G4RToEConvForPositron::taul
G4double taul
Definition:
G4RToEConvForPositron.hh:69
G4RToEConvForPositron.hh
G4SystemOfUnits.hh
G4RToEConvForPositron::ionpotlog
G4double ionpotlog
Definition:
G4RToEConvForPositron.hh:71
G4ParticleTable.hh
G4RToEConvForPositron::~G4RToEConvForPositron
virtual ~G4RToEConvForPositron()
Definition:
G4RToEConvForPositron.cc:67
G4PhysicsLogVector.hh
t2
TTree * t2
Definition:
plottest35.C:36
G4RToEConvForPositron::ionpot
G4double ionpot
Definition:
G4RToEConvForPositron.hh:70
G4VRangeToEnergyConverter::GetVerboseLevel
G4int GetVerboseLevel() const
Definition:
G4VRangeToEnergyConverter.hh:165
G4RToEConvForPositron::ComputeLoss
virtual G4double ComputeLoss(G4double AtomicNumber, G4double KineticEnergy)
Definition:
G4RToEConvForPositron.cc:77
G4cout
G4GLOB_DLL std::ostream G4cout
G4VRangeToEnergyConverter::theParticle
const G4ParticleDefinition * theParticle
Definition:
G4VRangeToEnergyConverter.hh:114
G4ParticleDefinition.hh
G4RToEConvForPositron::G4RToEConvForPositron
G4RToEConvForPositron()
Definition:
G4RToEConvForPositron.cc:45
e
Float_t e
Definition:
extended/medical/dna/range/plot.C:35
GeV
static constexpr double GeV
Definition:
G4SIunits.hh:217
다음에 의해 생성됨 :
1.8.5