G4HyperNucleiProperties.cc

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//
// G4HyperNucleiProperties class implementation
//
// Author: Mikhail Kosov
// Revision: H.Kurashige, Migrated to particles category - September 2007
// --------------------------------------------------------------------
 
#include "G4HyperNucleiProperties.hh"
 
#include "G4Exp.hh"
#include "G4NucleiProperties.hh"
#include "G4ParticleTable.hh"
#include "G4PhysicalConstants.hh"
#include "G4Pow.hh"
#include "G4SystemOfUnits.hh"
 
G4double G4HyperNucleiProperties::GetNuclearMass(G4int A, G4int Z, G4int LL)
{
  if (LL == 0) return G4NucleiProperties::GetNuclearMass(A, Z);
 
  if (A < 2 || Z < 0 || Z > A - LL || LL > A) {
#ifdef G4VERBOSE
    if (G4ParticleTable::GetParticleTable()->GetVerboseLevel() > 0) {
      G4cout << "G4HyperNucleiProperties::GetNuclearMass: "
             << " Wrong values for A = " << A << " Z = " << Z << " L = " << LL << G4endl;
    }
#endif
    return 0.0;
  }
  if (A == 2) {
#ifdef G4VERBOSE
    if (G4ParticleTable::GetParticleTable()->GetVerboseLevel() > 0) {
      G4cout << "G4HyperNucleiProperties::GetNuclearMass: "
             << " No boud state for A = " << A << " Z = " << Z << " L = " << LL << G4endl;
    }
#endif
    return 0.0;
  }
 
  static const G4double b7 = 25.0 * MeV;
  static const G4double b8 = 10.5;  // Slope
  static const G4double a2 = 0.13 * MeV;  // BindingEnergy for d+Lambda(MeV)
  static const G4double a3 = 2.2 * MeV;  // BindingEnergy for (t/He3)+Lamb(MeV)
  static const G4double eps = 0.0001 * MeV;  // security value (MeV)
 
  G4double mass = G4NucleiProperties::GetNuclearMass(A - LL, Z);  // A non-"strange" nucleus
 
  // Temporarily, the mass of the Lambda below is copied from G4Lambda.cc,
  // but it should be added in CLHEP/Units/PhysicalConstants.h
  const G4double mLL = 1.115683 * CLHEP::GeV;
 
  G4double bs = 0.0;
  if (A - LL == 2)
    bs = a2;  // for nnL,npL,ppL
  else if (A - LL == 3)
    bs = a3;  // for 3nL,2npL,n2pL,3pL
  else if (A - LL > 3)
    bs = b7 * G4Exp(-b8 / (A - LL + 1.0));
  mass += LL * (mLL - bs) + eps;
 
  return mass;
}
 
G4double G4HyperNucleiProperties::GetAtomicMass(G4int A, G4int Z, G4int LL)
{
  G4double mass = GetNuclearMass(A, Z, LL);
  if (mass > 0.0) {
    mass += Z * electron_mass_c2 - 1.433e-5 * MeV * G4Pow::GetInstance()->powZ(Z, 2.39);
  }
  return mass;
}