| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer 3 // * License and Disclaimer *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. 9 // * include a list of copyright holders. *
10 // * 10 // * *
11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. *
17 // * 17 // * *
18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. *
24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 // 26 //
27 // ------------------------------------------- 27 // -------------------------------------------------------------------
28 // GEANT 4 class implementation file 28 // GEANT 4 class implementation file
29 // 29 //
30 // CERN, Geneva, Switzerland 30 // CERN, Geneva, Switzerland
31 // 31 //
32 // File name: G4SigmaMinusField.cc 32 // File name: G4SigmaMinusField.cc
33 // 33 //
34 // Author: Alessandro Brunengo (Al 34 // Author: Alessandro Brunengo (Alessandro.Brunengo@ge.infn.it)
35 // 35 //
36 // Creation date: 5 June 2000 36 // Creation date: 5 June 2000
37 // ------------------------------------------- 37 // -------------------------------------------------------------------
38 <<
39 #include "G4SigmaMinusField.hh" 38 #include "G4SigmaMinusField.hh"
40 #include "G4PhysicalConstants.hh" <<
41 #include "G4SystemOfUnits.hh" <<
42 #include "G4NucleiProperties.hh" 39 #include "G4NucleiProperties.hh"
43 #include "G4VNuclearDensity.hh" 40 #include "G4VNuclearDensity.hh"
44 #include "G4FermiMomentum.hh" 41 #include "G4FermiMomentum.hh"
45 #include "G4SigmaMinus.hh" 42 #include "G4SigmaMinus.hh"
46 #include "G4HadTmpUtil.hh" 43 #include "G4HadTmpUtil.hh"
47 #include "G4Pow.hh" <<
48 44
49 G4SigmaMinusField::G4SigmaMinusField(G4V3DNucl 45 G4SigmaMinusField::G4SigmaMinusField(G4V3DNucleus * nucleus, G4double coeff)
50 : G4VNuclearField(nucleus) 46 : G4VNuclearField(nucleus)
51 { 47 {
52 theCoeff = coeff; 48 theCoeff = coeff;
53 } 49 }
54 50
55 G4SigmaMinusField::~G4SigmaMinusField() 51 G4SigmaMinusField::~G4SigmaMinusField()
56 { } 52 { }
57 53
>> 54
>> 55 const G4SigmaMinusField & G4SigmaMinusField::operator=(const G4SigmaMinusField &)
>> 56 {
>> 57 throw G4HadronicException(__FILE__, __LINE__, "G4SigmaMinusField::operator= meant not to be accessible");
>> 58 return *this;
>> 59 }
>> 60
>> 61
>> 62 G4int G4SigmaMinusField::operator==(const G4SigmaMinusField &) const
>> 63 {
>> 64 throw G4HadronicException(__FILE__, __LINE__, "G4SigmaMinusField::operator== meant not to be accessible");
>> 65 return 0;
>> 66 }
>> 67
>> 68
>> 69 G4int G4SigmaMinusField::operator!=(const G4SigmaMinusField &) const
>> 70 {
>> 71 throw G4HadronicException(__FILE__, __LINE__, "G4SigmaMinusField::operator!= meant not to be accessible");
>> 72 return 1;
>> 73 }
>> 74
>> 75
>> 76
58 G4double G4SigmaMinusField::GetField(const G4T 77 G4double G4SigmaMinusField::GetField(const G4ThreeVector & aPosition)
59 { 78 {
60 // Field is 0 out of the nucleus! 79 // Field is 0 out of the nucleus!
61 if(aPosition.mag() >= radius) return 0.0; 80 if(aPosition.mag() >= radius) return 0.0;
62 81
63 G4double sigmaMinusMass = G4SigmaMinus::Sigm 82 G4double sigmaMinusMass = G4SigmaMinus::SigmaMinus()->GetPDGMass();
64 83
65 G4int A = theNucleus->GetMassNumber(); 84 G4int A = theNucleus->GetMassNumber();
66 G4int Z = theNucleus->GetCharge(); 85 G4int Z = theNucleus->GetCharge();
67 G4double bindingEnergy = G4NucleiProperties: 86 G4double bindingEnergy = G4NucleiProperties::GetBindingEnergy(A, Z);
68 G4double nucleusMass = Z*proton_mass_c2+(A-Z 87 G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy;
69 G4double reducedMass = sigmaMinusMass*nucleu 88 G4double reducedMass = sigmaMinusMass*nucleusMass/(sigmaMinusMass+nucleusMass);
70 89
71 const G4VNuclearDensity * nuclearDensity=the 90 const G4VNuclearDensity * nuclearDensity=theNucleus->GetNuclearDensity();
72 G4double density = nuclearDensity->GetDensit 91 G4double density = nuclearDensity->GetDensity(aPosition);
73 92
74 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)* 93 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)*theCoeff*density+GetBarrier();
75 } 94 }
76 95
>> 96
77 G4double G4SigmaMinusField::GetBarrier() 97 G4double G4SigmaMinusField::GetBarrier()
78 { 98 {
79 G4double A = theNucleus->GetMassNumber(); 99 G4double A = theNucleus->GetMassNumber();
80 G4double Z = theNucleus->GetCharge(); 100 G4double Z = theNucleus->GetCharge();
81 G4double coulombBarrier = (1.44/1.14) * MeV << 101 G4double coulombBarrier = (1.44/1.14) * MeV * Z / (1.0 + std::pow(A,1./3.));
82 return -coulombBarrier; 102 return -coulombBarrier;
83 } 103 }
84 104
85 105