G4FermiParticle.cc

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//
// G4FermiBreakUpAN alternative de-excitation model
// by A. Novikov (January 2025)
//
 
#include "G4FermiParticle.hh"
 
#include "G4FermiDataTypes.hh"
#include "G4FermiNucleiProperties.hh"
 
#include <G4PhysicalConstants.hh>
 
#include <iomanip>
 
G4FermiParticle::G4FermiParticle(G4FermiAtomicMass atomicMass, G4FermiChargeNumber chargeNumber,
                                 const G4LorentzVector& momentum)
  : atomicMass_(atomicMass), chargeNumber_(chargeNumber), momentum_(momentum)
{
  FERMI_ASSERT_MSG(static_cast<std::uint32_t>(atomicMass_)
                     >= static_cast<std::uint32_t>(chargeNumber),
                   "imposible particle: A = " << atomicMass_ << ", Z = " << chargeNumber);
 
  RecalculateExcitationEnergy();
}
 
G4FermiAtomicMass G4FermiParticle::GetAtomicMass() const
{
  return atomicMass_;
}
 
G4FermiChargeNumber G4FermiParticle::GetChargeNumber() const
{
  return chargeNumber_;
}
 
const G4LorentzVector& G4FermiParticle::GetMomentum() const
{
  return momentum_;
}
 
G4double G4FermiParticle::GetExcitationEnergy() const
{
  return excitationEnergy_;
}
 
G4bool G4FermiParticle::IsStable() const
{
  return excitationEnergy_ <= 0.;
}
 
void G4FermiParticle::RecalculateExcitationEnergy()
{
  excitationEnergy_ =
    momentum_.mag() - G4FermiNucleiProperties::GetNuclearMass(atomicMass_, chargeNumber_);
  if (excitationEnergy_ < 0.) {
    if (excitationEnergy_ < -10.0 * CLHEP::eV) {
      G4ExceptionDescription ed;
      ed << "Excitation energy is too negative: " << excitationEnergy_ / CLHEP::MeV << " MeV";
      G4Exception("G4FermiParticle::RecalculateExcitationEnergy()", "Fermi001", JustWarning, ed);
    }
    excitationEnergy_ = 0.;
  }
}
 
std::ostream& std::operator<<(std::ostream& out, const G4FermiParticle& particle)
{
  const auto oldFlags = out.flags();
  const auto oldUserPrecision = out.precision();
 
  out.setf(std::ios::floatfield);
  out << "FermiParticle: { A = " << particle.GetAtomicMass()
      << ", Z = " << particle.GetChargeNumber();
 
  out.setf(std::ios::scientific, std::ios::floatfield);
  out << std::setprecision(3) << ", U = " << particle.GetExcitationEnergy() / CLHEP::MeV << " MeV"
      << ", IsGroundState = " << (particle.IsStable() ? "yes" : "no") << ", P = ("
      << particle.GetMomentum().x() / CLHEP::MeV << ", " << particle.GetMomentum().y() / CLHEP::MeV
      << ", " << particle.GetMomentum().z() / CLHEP::MeV
      << ") MeV, E = " << particle.GetMomentum().t() / CLHEP::MeV << " MeV}"
      << " }";
 
  out.setf(oldFlags, std::ios::floatfield);
  out.precision(oldUserPrecision);
 
  return out;
}