source: trunk/source/materials/src/G4IonisParamElm.cc @ 839

Last change on this file since 839 was 822, checked in by garnier, 16 years ago

import all except CVS
File size: 7.0 KB
Line 
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: G4IonisParamElm.cc,v 1.14 2006/06/29 19:12:43 gunter Exp $
28// GEANT4 tag $Name:  $
29//
30//
31//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
32//
33// 06-09-04, Update calculated values after any change of ionisation
34//           potential change. V.Ivanchenko
35// 17-10-02, Fix excitation energy interpolation. V.Ivanchenko
36// 08-03-01, correct handling of fShellCorrectionVector. M.Maire
37// 22-11-00, tabulation of ionisation potential from
38//           the ICRU Report N#37. V.Ivanchenko
39// 09-07-98, data moved from G4Element. M.Maire
40//
41//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
42
43#include "G4IonisParamElm.hh"
44
45//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
46
47G4IonisParamElm::G4IonisParamElm(G4double Z)
48{
49    if (Z < 1.) G4Exception
50      (" ERROR! It is not allowed to create an Element with Z < 1" );
51   
52    // some basic functions of the atomic number
53    fZ = Z;
54    fZ3  = std::pow(fZ, 1./3.);
55    fZZ3 = std::pow(fZ*(fZ+1.), 1./3.);
56    flogZ3 = std::log(fZ)/3.;
57   
58     // Parameters for energy loss by ionisation   
59
60     // Mean excitation energy
61     // from "Stopping Powers for Electrons and Positrons"
62     // ICRU Report N#37, 1984  (energy in eV)
63    static double exc[100] = { 
64    21.8, 20.9, 13.3, 15.9, 15.2, 13.0, 11.7, 11.9, 11.5, 13.7,
65    13.6, 13.0, 12.8, 12.4, 11.5, 11.3, 10.2, 10.4, 10.0,  9.6,
66    10.3, 10.6, 10.7, 10.7, 10.9, 11.0, 11.0, 11.1, 11.1, 11.0,
67    10.8, 10.4, 10.5, 10.2,  9.8,  9.8,  9.8,  9.6,  9.7,  9.8,
68    10.2, 10.1, 10.0, 10.0, 10.0, 10.2, 10.0,  9.8, 10.0,  9.8,
69     9.5,  9.3,  9.3,  8.9,  8.9,  8.8,  8.8,  8.8,  9.1,  9.1,
70     9.2,  9.3,  9.2,  9.2,  9.4,  9.5,  9.7,  9.7,  9.8,  9.8,
71     9.8,  9.8,  9.8,  9.8,  9.8,  9.8,  9.8, 10.1, 10.0, 10.0,
72    10.0, 10.0,  9.9,  9.9,  9.7,  9.2,  9.5,  9.4,  9.4,  9.4,
73     9.6,  9.7,  9.7,  9.8,  9.8,  9.8,  9.8,  9.9,  9.9,  9.9 };
74
75    G4int iz = (G4int)Z - 1 ;
76    if(0  > iz) iz = 0;
77    else if(99 < iz) iz = 99 ;
78    fMeanExcitationEnergy = fZ * exc[iz] * eV ;
79
80
81    fTau0 = 0.1*fZ3*MeV/proton_mass_c2;
82    fTaul = 2.*MeV/proton_mass_c2;
83
84    // compute the Bethe-Bloch formula for energy = fTaul*particle mass
85    G4double rate = fMeanExcitationEnergy/electron_mass_c2 ;
86    G4double w = fTaul*(fTaul+2.) ;
87    fBetheBlochLow = (fTaul+1.)*(fTaul+1.)*std::log(2.*w/rate)/w - 1. ;
88    fBetheBlochLow = 2.*fZ*twopi_mc2_rcl2*fBetheBlochLow ; 
89 
90    fClow = std::sqrt(fTaul)*fBetheBlochLow;
91    fAlow = 6.458040 * fClow/fTau0;
92    G4double Taum = 0.035*fZ3*MeV/proton_mass_c2;
93    fBlow =-3.229020*fClow/(fTau0*std::sqrt(Taum));
94
95    // Shell correction factors
96    fShellCorrectionVector = new G4double[3]; //[3]
97    rate = 0.001*fMeanExcitationEnergy/eV;
98    G4double rate2 = rate*rate;
99    /*   
100    fShellCorrectionVector[0] = ( 1.10289e5 + 5.14781e8*rate)*rate2 ;
101    fShellCorrectionVector[1] = ( 7.93805e3 - 2.22565e7*rate)*rate2 ;
102    fShellCorrectionVector[2] = (-9.92256e1 + 2.10823e5*rate)*rate2 ;
103    */
104    fShellCorrectionVector[0] = ( 0.422377   + 3.858019*rate)*rate2 ;
105    fShellCorrectionVector[1] = ( 0.0304043  - 0.1667989*rate)*rate2 ;
106    fShellCorrectionVector[2] = (-0.00038106 + 0.00157955*rate)*rate2 ;
107}
108
109//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
110
111// Fake default constructor - sets only member data and allocates memory
112//                            for usage restricted to object persistency
113
114G4IonisParamElm::G4IonisParamElm(__void__&)
115  : fShellCorrectionVector(0)
116{
117}
118
119//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
120
121G4IonisParamElm::~G4IonisParamElm()
122{
123  if (fShellCorrectionVector) delete [] fShellCorrectionVector; 
124}
125
126//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
127
128G4IonisParamElm::G4IonisParamElm(G4IonisParamElm& right)
129{
130  *this = right;
131}
132
133//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
134
135const G4IonisParamElm& G4IonisParamElm::operator=(const G4IonisParamElm& right)
136{
137  if (this != &right)
138    {
139      fZ                     = right.fZ;
140      fZ3                    = right.fZ3;
141      fZZ3                   = right.fZZ3;
142      flogZ3                 = right.flogZ3;
143      fTau0                  = right.fTau0;
144      fTaul                  = right.fTaul;
145      fBetheBlochLow         = right.fBetheBlochLow;
146      fAlow                  = right.fAlow;
147      fBlow                  = right.fBlow;
148      fClow                  = right.fClow;
149      fMeanExcitationEnergy  = right.fMeanExcitationEnergy;
150      if (fShellCorrectionVector) delete [] fShellCorrectionVector;             
151      fShellCorrectionVector = new G4double[3];           
152      fShellCorrectionVector[0] = right.fShellCorrectionVector[0];
153      fShellCorrectionVector[1] = right.fShellCorrectionVector[1];
154      fShellCorrectionVector[2] = right.fShellCorrectionVector[2];     
155     } 
156  return *this;
157}
158
159//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
160
161G4int G4IonisParamElm::operator==(const G4IonisParamElm& right) const
162{
163  return (this == (G4IonisParamElm *) &right);
164}
165
166//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
167
168G4int G4IonisParamElm::operator!=(const G4IonisParamElm& right) const
169{
170  return (this != (G4IonisParamElm *) &right);
171}
172
173//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
Note: See TracBrowser for help on using the repository browser.