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
examples
extended
biasing
GB05
src
GB05BOptnSplitAndKillByCrossSection.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
// $Id$
27
//
30
31
#include "
Randomize.hh
"
32
#include "
GB05BOptnSplitAndKillByCrossSection.hh
"
33
34
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
35
36
GB05BOptnSplitAndKillByCrossSection::GB05BOptnSplitAndKillByCrossSection
(
G4String
name
)
37
:
G4VBiasingOperation
(name),
38
fParticleChange(),
39
fInteractionLength(-1.0)
40
{}
41
42
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
43
44
GB05BOptnSplitAndKillByCrossSection::~GB05BOptnSplitAndKillByCrossSection
()
45
{}
46
47
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
48
49
G4double
GB05BOptnSplitAndKillByCrossSection::
50
DistanceToApplyOperation
(
const
G4Track
*,
51
G4double
,
52
G4ForceCondition
*
condition
)
53
{
54
*condition =
NotForced
;
55
56
// -- Sample the exponential law using the total interaction length of processes
57
// -- to couterbalance for:
58
G4double
proposedStepLength = -std::log(
G4UniformRand
() ) *
fInteractionLength
;
59
60
return
proposedStepLength;
61
}
62
63
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
64
65
G4VParticleChange
*
66
GB05BOptnSplitAndKillByCrossSection::GenerateBiasingFinalState
(
const
G4Track
*
track
,
67
const
G4Step
* )
68
{
69
70
// -- This method is called if we have limited the step.
71
// -- We hence make the splitting or killing.
72
73
// Get track weight:
74
G4double
initialWeight = track->
GetWeight
();
75
76
// The "particle change" is the object to be used to communicate to
77
// the tracking the update of the primary state and/or creation
78
// secondary tracks.
79
fParticleChange
.
Initialize
(*track);
80
81
// -- Splitting and killing factors.
82
// -- They are taken the same, but the killing factor can be make bigger.
83
G4double
splittingFactor = 2.0;
84
G4double
killingFactor = 2.0;
85
86
87
if
( track->
GetMomentumDirection
().
z
() > 0 )
88
{
89
// -- We split if the track is moving forward:
90
91
// Define the tracks weight:
92
G4double
weightOfTrack = initialWeight/splittingFactor;
93
94
// Ask currect track weight to be changed to new value:
95
fParticleChange
.
ProposeParentWeight
( weightOfTrack );
96
// Now make clones of this track (this is the actual splitting):
97
// we will then have the primary and clone of it, hence the
98
// splitting by a factor 2:
99
G4Track
* clone =
new
G4Track
( *track );
100
clone->
SetWeight
( weightOfTrack );
101
fParticleChange
.
AddSecondary
( clone );
102
// -- Below's call added for safety & illustration : inform particle change to not
103
// -- modify the clone (ie : daughter) weight to male it that of the
104
// -- primary. Here call not mandatory and both tracks have same weights.
105
fParticleChange
.
SetSecondaryWeightByProcess
(
true
);
106
}
107
else
108
{
109
// -- We apply Russian roulette if the track is moving backward:
110
111
// Shoot a random number (in ]0,1[ segment):
112
G4double
random =
G4UniformRand
();
113
G4double
killingProbability = 1.0 - 1.0/killingFactor;
114
if
( random < killingProbability )
115
{
116
// We ask for the the track to be killed:
117
fParticleChange
.
ProposeTrackStatus
(
fStopAndKill
);
118
}
119
else
120
{
121
// In this case, the track survives. We change its weight
122
// to conserve weight among killed and survival tracks:
123
fParticleChange
.
ProposeParentWeight
( initialWeight*killingFactor );
124
}
125
}
126
127
return
&
fParticleChange
;
128
129
}
130
131
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
name
const XML_Char * name
Definition:
expat.h:151
G4Track::SetWeight
void SetWeight(G4double aValue)
Randomize.hh
GB05BOptnSplitAndKillByCrossSection::~GB05BOptnSplitAndKillByCrossSection
virtual ~GB05BOptnSplitAndKillByCrossSection()
Definition:
GB05BOptnSplitAndKillByCrossSection.cc:44
GB05BOptnSplitAndKillByCrossSection::GenerateBiasingFinalState
virtual G4VParticleChange * GenerateBiasingFinalState(const G4Track *, const G4Step *) final
Definition:
GB05BOptnSplitAndKillByCrossSection.cc:66
fStopAndKill
Definition:
G4TrackStatus.hh:56
G4String
Definition:
examples/extended/parallel/TopC/ParN02/AnnotatedFiles/G4String.hh:45
CLHEP::Hep3Vector::z
double z() const
G4VParticleChange::SetSecondaryWeightByProcess
void SetSecondaryWeightByProcess(G4bool)
G4VParticleChange
Definition:
G4VParticleChange.hh:94
condition
G4double condition(const G4ErrorSymMatrix &m)
G4ParticleChange::AddSecondary
void AddSecondary(G4Track *aSecondary)
Definition:
G4ParticleChange.cc:218
G4Track::GetWeight
G4double GetWeight() const
GB05BOptnSplitAndKillByCrossSection::DistanceToApplyOperation
virtual G4double DistanceToApplyOperation(const G4Track *, G4double, G4ForceCondition *condition) final
Definition:
GB05BOptnSplitAndKillByCrossSection.cc:50
G4double
double G4double
Definition:
G4Types.hh:76
G4ParticleChange::Initialize
virtual void Initialize(const G4Track &)
Definition:
G4ParticleChange.cc:228
G4Track
Definition:
G4Track.hh:76
GB05BOptnSplitAndKillByCrossSection::fInteractionLength
G4double fInteractionLength
Definition:
GB05BOptnSplitAndKillByCrossSection.hh:89
NotForced
Definition:
G4ForceCondition.hh:56
G4UniformRand
#define G4UniformRand()
Definition:
Randomize.hh:53
G4Step
Definition:
G4Step.hh:76
G4VBiasingOperation
Definition:
G4VBiasingOperation.hh:77
GB05BOptnSplitAndKillByCrossSection::fParticleChange
G4ParticleChange fParticleChange
Definition:
GB05BOptnSplitAndKillByCrossSection.hh:88
G4VParticleChange::ProposeParentWeight
void ProposeParentWeight(G4double finalWeight)
GB05BOptnSplitAndKillByCrossSection.hh
Definition of the GB05BOptnSplitAndKillByCrossSection class.
G4ForceCondition
G4ForceCondition
Definition:
G4ForceCondition.hh:49
GB05BOptnSplitAndKillByCrossSection::GB05BOptnSplitAndKillByCrossSection
GB05BOptnSplitAndKillByCrossSection(G4String name)
Definition:
GB05BOptnSplitAndKillByCrossSection.cc:36
G4Track::GetMomentumDirection
const G4ThreeVector & GetMomentumDirection() const
track
Float_t track
Definition:
extended/medical/dna/range/plot.C:35
G4VParticleChange::ProposeTrackStatus
void ProposeTrackStatus(G4TrackStatus status)
다음에 의해 생성됨 :
1.8.5