G4EvaporationLevelDensityParameter.cc

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// $Id$
//
// Hadronic Process: Nuclear De-excitations
// by V. Lara (Oct 1998)
//


#include "G4EvaporationLevelDensityParameter.hh"
#include "G4SystemOfUnits.hh"
#include "G4HadronicException.hh"

// Those values are from table 3 in 
// A.S. Iljinov et al. Nucl Phys A543 (1992) 517-557
// Table 3. alpha, beta and gamma for Cameron Shell corrections
// whithout collective effects. f-factor = 2.31.

//JMQ 17-04-08 these are not used at present in G4Evaporation 
const G4double G4EvaporationLevelDensityParameter::ConstEvapLevelDensityParameter = 0.125/MeV;
//const G4double G4EvaporationLevelDensityParameter::ConstEvapLevelDensityParameter= 0.0769231/MeV;
const G4double G4EvaporationLevelDensityParameter::alpha = 0.072/MeV;
const G4double G4EvaporationLevelDensityParameter::beta = 0.257/MeV;
const G4double G4EvaporationLevelDensityParameter::gamma = 0.059/MeV;
const G4double G4EvaporationLevelDensityParameter::Bs = 1.0;

G4EvaporationLevelDensityParameter::G4EvaporationLevelDensityParameter() {}
G4EvaporationLevelDensityParameter::~G4EvaporationLevelDensityParameter() {}

G4double 
G4EvaporationLevelDensityParameter::LevelDensityParameter(G4int A, G4int, G4double) const 
//JMQ (Apr .08) this is the method used in G4Evaporation 
{

  //JMQ 25/04/08  a=A/10 according to original Gudima's prescription
  G4double a=static_cast<G4double>(A)/10.;
  return a;
//

//    G4int N = A - Z;

    // Asymptotic Level Density Parameter
//    G4double AsymptoticLDP = (alpha*static_cast<G4double>(A) + beta*std::pow(static_cast<G4double>(A),2./3.)*Bs)/MeV;
    
    // Shape of the LDP U dependence
//    G4double exponent = -gamma*U;
//    G4double f = 1.;
//    if (exponent > -300.) f -= std::exp(exponent);
    
    // Level Density Parameter
//    G4double a = AsymptoticLDP*(1. + ShellCorrection(Z,N)*f/U);
//    return a;
}