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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: G4SigmaPlusField.cc 32 // File name: G4SigmaPlusField.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 "G4SigmaPlusField.hh" 39 #include "G4SigmaPlusField.hh" 40 #include "G4PhysicalConstants.hh" 40 #include "G4PhysicalConstants.hh" 41 #include "G4SystemOfUnits.hh" 41 #include "G4SystemOfUnits.hh" 42 #include "G4NucleiProperties.hh" 42 #include "G4NucleiProperties.hh" 43 #include "G4VNuclearDensity.hh" 43 #include "G4VNuclearDensity.hh" 44 #include "G4FermiMomentum.hh" 44 #include "G4FermiMomentum.hh" 45 #include "G4SigmaPlus.hh" 45 #include "G4SigmaPlus.hh" 46 #include "G4HadTmpUtil.hh" 46 #include "G4HadTmpUtil.hh" 47 #include "G4Pow.hh" 47 #include "G4Pow.hh" 48 48 49 G4SigmaPlusField::G4SigmaPlusField(G4V3DNucleu 49 G4SigmaPlusField::G4SigmaPlusField(G4V3DNucleus * nucleus, G4double coeff) 50 : G4VNuclearField(nucleus) 50 : G4VNuclearField(nucleus) 51 { 51 { 52 theCoeff = coeff; 52 theCoeff = coeff; 53 } 53 } 54 54 55 55 56 G4SigmaPlusField::~G4SigmaPlusField() 56 G4SigmaPlusField::~G4SigmaPlusField() 57 { } 57 { } 58 58 59 G4double G4SigmaPlusField::GetField(const G4Th 59 G4double G4SigmaPlusField::GetField(const G4ThreeVector & aPosition) 60 { 60 { 61 // Field is 0 out of the nucleus! 61 // Field is 0 out of the nucleus! 62 if(aPosition.mag() >= radius) return 0.0; 62 if(aPosition.mag() >= radius) return 0.0; 63 63 64 G4double sigmaPlusMass = G4SigmaPlus::SigmaP 64 G4double sigmaPlusMass = G4SigmaPlus::SigmaPlus()->GetPDGMass(); 65 65 66 G4int A = theNucleus->GetMassNumber(); 66 G4int A = theNucleus->GetMassNumber(); 67 G4int Z = theNucleus->GetCharge(); 67 G4int Z = theNucleus->GetCharge(); 68 G4double bindingEnergy = G4NucleiProperties: 68 G4double bindingEnergy = G4NucleiProperties::GetBindingEnergy(A, Z); 69 G4double nucleusMass = Z*proton_mass_c2+(A-Z 69 G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy; 70 G4double reducedMass = sigmaPlusMass*nucleus 70 G4double reducedMass = sigmaPlusMass*nucleusMass/(sigmaPlusMass+nucleusMass); 71 71 72 const G4VNuclearDensity * nuclearDensity=the 72 const G4VNuclearDensity * nuclearDensity=theNucleus->GetNuclearDensity(); 73 G4double density = nuclearDensity->GetDensit 73 G4double density = nuclearDensity->GetDensity(aPosition); 74 74 75 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)* 75 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)*theCoeff*density+GetBarrier(); 76 } 76 } 77 77 78 G4double G4SigmaPlusField::GetBarrier() 78 G4double G4SigmaPlusField::GetBarrier() 79 { 79 { 80 G4double A = theNucleus->GetMassNumber(); 80 G4double A = theNucleus->GetMassNumber(); 81 G4double Z = theNucleus->GetCharge(); 81 G4double Z = theNucleus->GetCharge(); 82 G4double coulombBarrier = (1.44/1.14) * MeV 82 G4double coulombBarrier = (1.44/1.14) * MeV * Z / (1.0 + G4Pow::GetInstance()->A13(A)); 83 return coulombBarrier; 83 return coulombBarrier; 84 } 84 } 85 85 86 86 87 87 88 88 89 89