G4LevelManager.cc

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//
// -------------------------------------------------------------------
//
//      GEANT4 source file 
//
//      File name:     G4LevelManager
//
//      Author:        V.Ivanchenko
// 
//      Creation date: 4 January 2012
//
//      Modifications: 
//  13.02.2015 Design change for gamma de-excitation 
//      
// -------------------------------------------------------------------
 
#include "G4LevelManager.hh"
#include "G4NuclearLevelData.hh"
#include "G4ShellCorrection.hh"
#include "G4HadronicException.hh"
#include "G4Pow.hh"
#include <iomanip>
#include <CLHEP/Units/SystemOfUnits.h>
 
G4String G4LevelManager::fFloatingLevels[] = {
  "-", "+X", "+Y", "+Z", "+U", "+V", "+W", "+R", "+S", "+T", "+A", "+B", "+C"};
 
G4LevelManager::G4LevelManager(G4int Z, G4int A, std::size_t ntrans,
                               const std::vector<G4double>& energies,
                   const std::vector<G4int>& spin,
                   const std::vector<const G4NucLevel*>& levels)
  : nTransitions(0)
{ 
  if(0 < ntrans) {
    nTransitions = ntrans - 1;
    fLevelEnergy.reserve(ntrans);
    fSpin.reserve(ntrans);
    fLevels.reserve(ntrans);
    for(std::size_t i=0; i<ntrans; ++i) {
      fLevelEnergy.push_back(energies[i]);
      fSpin.push_back(spin[i]);
      fLevels.push_back(levels[i]);
    }
    //G4cout << "New G4LevelManager N= " << nTransitions << " " 
    //<< fLevelEnergy.size() << " <" << this << ">" << G4endl;
  }
  auto ndata = G4NuclearLevelData::GetInstance();
  fLevelDensity = ndata->GetLevelDensity(Z, A, 0.0);
 
  // J. Nucl. Sci. Tech. 31(2): 151-162 (1994)
  fShellCorrection = ndata->GetShellCorrection()->GetShellCorrection(A,Z);
  if(A > 20) {
    G4int N = A - Z;
    G4int In = N - (N/2)*2; 
    G4int Iz = Z - (Z/2)*2;
    G4double a13 = 1.0/G4Pow::GetInstance()->Z13(A);
    if(In == 0 && Iz == 0) {
      fLevelDensity = 0.067946*A*(1.0 + 4.1277*a13);
    } else if(In == 0 && Iz == 1) {
      fLevelDensity = 0.053061*A*(1.0 + 7.1862*a13);
    } else if(In == 1 && Iz == 0) {
      fLevelDensity = 0.060920*A*(1.0 + 3.8767*a13);
    } else {
      fLevelDensity = 0.065291*A*(1.0 + 4.4505*a13);
    }
  }
}
 
G4LevelManager::~G4LevelManager()
{
  for(std::size_t i=0; i<=nTransitions; ++i) { delete fLevels[i]; }
}
 
std::size_t G4LevelManager::NearestLevelIndex(const G4double energy,
                                              const std::size_t index) const
{
  std::size_t idx = std::min(index, nTransitions);
  static const G4double tolerance = 10*CLHEP::eV;
  if(0 == nTransitions || std::abs(energy - fLevelEnergy[idx]) <= tolerance) {
    return idx;
  }
  idx = NearestLowEdgeLevelIndex(energy);
  if(idx < nTransitions && 
     (fLevelEnergy[idx] + fLevelEnergy[idx+1])*0.5 <= energy) { ++idx; }
 
  return idx;
}
 
const G4String& G4LevelManager::FloatingType(const std::size_t i) const
{
  return fFloatingLevels[fSpin[i]/100000]; 
}
 
void G4LevelManager::StreamInfo(std::ostream& out) const
{
  for(std::size_t i=0; i<=nTransitions; ++i) {
    G4long prec = out.precision(6);
    out << std::setw(6) << i << ". " 
    << std::setw(8) << fLevelEnergy[i];
    if(fLevels[i]) {
    out << std::setw(8) << fLevels[i]->GetTimeGamma()
        << std::setw(4) << fLevels[i]->NumberOfTransitions()
        << std::setw(4) << std::abs(TwoSpinParity(i))
        << std::setw(4) << Parity(i)
        << std::setw(4) << FloatingLevel(i);
    }
    out << "\n";
    out.precision(prec);
    if(fLevels[i]) { fLevels[i]->StreamInfo(out); }
  }
}