Geant4.10
Main Page
Related Pages
Modules
Namespaces
Data Structures
Files
File List
Globals
All
Data Structures
Namespaces
Files
Functions
Variables
Typedefs
Enumerations
Enumerator
Friends
Macros
Groups
Pages
geant4.10.00.p01
source
processes
electromagnetic
polarisation
include
G4PolarizedComptonCrossSection.hh
Go to the documentation of this file.
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: G4PolarizedComptonCrossSection.hh 68046 2013-03-13 14:31:38Z gcosmo $
27
//
28
// GEANT4 Class file
29
//
30
//
31
// File name: G4PolarizedComptonCrossSection
32
//
33
// Author: Andreas Schaelicke
34
//
35
// Creation date: 15.05.2005
36
//
37
// Modifications:
38
// 18-07-06 use newly calculated cross sections (P. Starovoitov)
39
// 21-08-06 update interface to geant4.8.1 (A. Schaelicke)
40
// 15-10-07 introduced a more general framework for cross sections (AS)
41
//
42
//
43
// Class Description:
44
// determine the polarization of the final state
45
// in a Compton scattering process employing the differential
46
// cross section by F.W.Lipps & H.A.Tolhoek
47
// ( Physica 20 (1954) 395 )
48
//
49
#ifndef G4PolarizedComptonCrossSection_h
50
#define G4PolarizedComptonCrossSection_h 1
51
52
#include "
G4StokesVector.hh
"
53
#include "
G4VPolarizedCrossSection.hh
"
54
55
56
57
class
G4PolarizedComptonCrossSection
:
public
G4VPolarizedCrossSection
58
{
59
public
:
60
G4PolarizedComptonCrossSection
();
61
virtual
~G4PolarizedComptonCrossSection
();
62
public
:
63
// prepares the ingredients for the calculation of a polarization
64
// dependent differential cross section
65
// the kinematics is fixed (X - incoming photon energy in units of electron mass, eps - outgoing photon energy in unit of incoming photon energy,
66
// and polarization of the incoming particles fixed (p0, p1)
67
// a flag specifies the extent to which polarization is taken
68
// into account
69
virtual
void
Initialize
(
G4double
eps,
G4double
X,
G4double
phi,
70
const
G4StokesVector
& p0,
71
const
G4StokesVector
& p1,
72
G4int
flag=0);
73
74
// returns the differential cross section for a given polarisation state
75
// of the final state particles to be used in the calculation of the
76
// polarization transfer
77
// the calculation has to be initialised by calling Initialize()
78
// prior to the first call of this function (see above)
79
G4double
XSection
(
const
G4StokesVector
& pol2,
const
G4StokesVector
& pol3);
80
// total cross section
81
G4double
TotalXSection
(
G4double
xmin,
G4double
xmax,
G4double
y,
82
const
G4StokesVector
& pol0,
const
G4StokesVector
& pol1);
83
84
public
:
85
// return expected mean polarisation
86
G4StokesVector
GetPol2
();
87
G4StokesVector
GetPol3
();
88
private
:
89
void
DefineCoefficients(
const
G4StokesVector
& pol0,
90
const
G4StokesVector
& pol1);
91
// states if an incoming or outgoing particle is polarized
92
G4bool
gammaPol2, electronPol3;
93
94
// these variables store the information necessary to evaluate the
95
// differential cross section for arbitrary final state
96
// polarizations (used in XSection):
97
// - polarization independent part
98
G4double
phi0;
99
// - part depending on the polarization of the final photon
100
G4ThreeVector
phi2;
101
// - part depending on the polarization of the final electron
102
G4ThreeVector
phi3;
103
// - product of polarizations of initial particles
104
G4double
polxx, polyy, polzz, polxz, polzx, polyz, polzy, polxy, polyx;
105
106
G4double
diffXSFactor, totalXSFactor, re2;
107
G4double
polXS, unpXS;
108
};
109
110
111
#endif
CLHEP::Hep3Vector
Definition:
ThreeVector.h:41
G4PolarizedComptonCrossSection::XSection
G4double XSection(const G4StokesVector &pol2, const G4StokesVector &pol3)
Definition:
G4PolarizedComptonCrossSection.cc:159
G4StokesVector.hh
G4int
int G4int
Definition:
G4Types.hh:78
G4VPolarizedCrossSection.hh
G4PolarizedComptonCrossSection::GetPol3
G4StokesVector GetPol3()
Definition:
G4PolarizedComptonCrossSection.cc:223
G4PolarizedComptonCrossSection::GetPol2
G4StokesVector GetPol2()
Definition:
G4PolarizedComptonCrossSection.cc:214
G4bool
bool G4bool
Definition:
G4Types.hh:79
G4StokesVector
Definition:
G4StokesVector.hh:58
G4PolarizedComptonCrossSection::TotalXSection
G4double TotalXSection(G4double xmin, G4double xmax, G4double y, const G4StokesVector &pol0, const G4StokesVector &pol1)
Definition:
G4PolarizedComptonCrossSection.cc:186
G4PolarizedComptonCrossSection::Initialize
virtual void Initialize(G4double eps, G4double X, G4double phi, const G4StokesVector &p0, const G4StokesVector &p1, G4int flag=0)
Definition:
G4PolarizedComptonCrossSection.cc:74
G4PolarizedComptonCrossSection
Definition:
G4PolarizedComptonCrossSection.hh:57
G4PolarizedComptonCrossSection::~G4PolarizedComptonCrossSection
virtual ~G4PolarizedComptonCrossSection()
Definition:
G4PolarizedComptonCrossSection.cc:70
G4PolarizedComptonCrossSection::G4PolarizedComptonCrossSection
G4PolarizedComptonCrossSection()
Definition:
G4PolarizedComptonCrossSection.cc:51
G4VPolarizedCrossSection
Definition:
G4VPolarizedCrossSection.hh:50
G4double
double G4double
Definition:
G4Types.hh:76
Generated on Wed Apr 30 2014 15:55:00 for Geant4.10 by
1.8.7