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Geant4/processes/hadronic/models/binary_cascade/src/G4PionZeroField.cc

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Diff markup

Differences between /processes/hadronic/models/binary_cascade/src/G4PionZeroField.cc (Version 11.3.0) and /processes/hadronic/models/binary_cascade/src/G4PionZeroField.cc (Version 10.2.p1)


  1 //                                                  1 //
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 17 // *                                               17 // *                                                                  *
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 19 // * technical work of the GEANT4 collaboratio     19 // * technical work of the GEANT4 collaboration.                      *
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 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:     G4PionZeroField.cc          32 //      File name:     G4PionZeroField.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                                                    38 
 39 #include "G4PionZeroField.hh"                      39 #include "G4PionZeroField.hh"
 40 #include "G4PhysicalConstants.hh"                  40 #include "G4PhysicalConstants.hh"
 41 #include "G4NucleiProperties.hh"                   41 #include "G4NucleiProperties.hh"
 42 #include "G4VNuclearDensity.hh"                    42 #include "G4VNuclearDensity.hh"
 43 #include "G4FermiMomentum.hh"                      43 #include "G4FermiMomentum.hh"
 44 #include "G4PionZero.hh"                           44 #include "G4PionZero.hh"
 45 #include "G4HadTmpUtil.hh"                         45 #include "G4HadTmpUtil.hh"
 46                                                    46 
 47 G4PionZeroField::G4PionZeroField(G4V3DNucleus      47 G4PionZeroField::G4PionZeroField(G4V3DNucleus * nucleus, G4double coeff)
 48   : G4VNuclearField(nucleus)                       48   : G4VNuclearField(nucleus)
 49 {                                                  49 {
 50   theCoeff = coeff;                                50   theCoeff = coeff;
 51 }                                                  51 }
 52                                                    52 
 53                                                    53 
 54 G4PionZeroField::~G4PionZeroField()                54 G4PionZeroField::~G4PionZeroField()
 55 { }                                                55 { }
 56                                                    56 
 57 G4double G4PionZeroField::GetField(const G4Thr     57 G4double G4PionZeroField::GetField(const G4ThreeVector & aPosition)
 58 {                                                  58 {
 59 // Field is 0 out of the nucleus!                  59 // Field is 0 out of the nucleus!
 60   if(aPosition.mag() >= radius) return 0.0;        60   if(aPosition.mag() >= radius) return 0.0;
 61                                                    61 
 62   G4double pionZeroMass = G4PionZero::PionZero     62   G4double pionZeroMass = G4PionZero::PionZero()->GetPDGMass();
 63   G4int A = theNucleus->GetMassNumber();           63   G4int A = theNucleus->GetMassNumber();
 64   G4int Z = theNucleus->GetCharge();               64   G4int Z = theNucleus->GetCharge();
 65                                                    65 
 66   G4double bindingEnergy = G4NucleiProperties:     66   G4double bindingEnergy = G4NucleiProperties::GetBindingEnergy(A, Z);
 67   G4double nucleusMass = Z*proton_mass_c2+(A-Z     67   G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy;
 68   G4double reducedMass = pionZeroMass*nucleusM     68   G4double reducedMass = pionZeroMass*nucleusMass/(pionZeroMass+nucleusMass);
 69                                                    69 
 70                                                    70 
 71   G4double density = A*theNucleus->GetNuclearD     71   G4double density = A*theNucleus->GetNuclearDensity()->GetDensity(aPosition);
 72   G4double nucleonMass = (proton_mass_c2+neutr     72   G4double nucleonMass = (proton_mass_c2+neutron_mass_c2)/2;
 73                                                    73 
 74   return 2.*pi*hbarc*hbarc/reducedMass*(1+pion     74   return 2.*pi*hbarc*hbarc/reducedMass*(1+pionZeroMass/nucleonMass)*theCoeff*density;
 75 }                                                  75 }
 76                                                    76 
 77 G4double G4PionZeroField::GetBarrier()             77 G4double G4PionZeroField::GetBarrier()
 78 {                                                  78 {
 79   return 0;                                        79   return 0;
 80 }                                                  80 }
 81                                                    81