include/Geant4/G4FissionLevelDensityParameterINCLXX.hh

0001 //
0002 // ********************************************************************
0003 // * License and Disclaimer                                           *
0004 // *                                                                  *
0005 // * The  Geant4 software  is  copyright of the Copyright Holders  of *
0006 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
0007 // * conditions of the Geant4 Software License,  included in the file *
0008 // * LICENSE and available at  http://cern.ch/geant4/license .  These *
0009 // * include a list of copyright holders.                             *
0010 // *                                                                  *
0011 // * Neither the authors of this software system, nor their employing *
0012 // * institutes,nor the agencies providing financial support for this *
0013 // * work  make  any representation or  warranty, express or implied, *
0014 // * regarding  this  software system or assume any liability for its *
0015 // * use.  Please see the license in the file  LICENSE  and URL above *
0016 // * for the full disclaimer and the limitation of liability.         *
0017 // *                                                                  *
0018 // * This  code  implementation is the result of  the  scientific and *
0019 // * technical work of the GEANT4 collaboration.                      *
0020 // * By using,  copying,  modifying or  distributing the software (or *
0021 // * any work based  on the software)  you  agree  to acknowledge its *
0022 // * use  in  resulting  scientific  publications,  and indicate your *
0023 // * acceptance of all terms of the Geant4 Software license.          *
0024 // ********************************************************************
0025 //
0026 //
0027 //
0028 // Hadronic Process: Nuclear De-excitation
0029 // by D. Mancusi (6th October 2014)
0030 //
0031
0032 #ifndef G4FissionLevelDensityParameterINCLXX_h
0033 #define G4FissionLevelDensityParameterINCLXX_h 1
0034
0035 #include "G4VLevelDensityParameter.hh"
0036
0037 class G4NuclearLevelData;
0038
0039 /** \class G4FissionLevelDensityParameterINCLXX
0040  *  \brief Revised level-density parameter for fission after INCL++
0041  *  \author Davide Mancusi
0042  *  \date 6th October 2014
0043  *
0044  * This class contains a revised level-density parameter that works better than
0045  * the standard one with the Li\`ege Intranuclear Cascade model (INCL++). The
0046  * fit parameter is the ratio of the level-density parameters in the fission
0047  * channel and in the neutron-evaporation channel. This is commonly known as
0048  * af/an and is usually very close to 1.0. Variations of a few percent are
0049  * likely to induce large factors in the fission probability, because of the
0050  * exponential growth of the Fermi level density. The best values of af/an were
0051  * empirically found to be about 1.02 for 1-GeV p+208Pb and 1.04 for 1-GeV
0052  * p+U238. A linear interpolation was adopted between the two extreme values.
0053  */
0054
0055 class G4NuclearLevelData;
0056
0057 class G4FissionLevelDensityParameterINCLXX : public G4VLevelDensityParameter
0058 {
0059 public:
0060   explicit G4FissionLevelDensityParameterINCLXX();
0061   virtual ~G4FissionLevelDensityParameterINCLXX();
0062
0063 private:
0064   G4FissionLevelDensityParameterINCLXX(const G4FissionLevelDensityParameterINCLXX &right);
0065   const G4FissionLevelDensityParameterINCLXX & operator=
0066   (const G4FissionLevelDensityParameterINCLXX &right);
0067   G4bool operator==(const G4FissionLevelDensityParameterINCLXX &right) const;
0068   G4bool operator!=(const G4FissionLevelDensityParameterINCLXX &right) const;
0069
0070 public:
0071   G4double LevelDensityParameter(G4int A, G4int Z, G4double U) const final;
0072
0073   void setAfanLow(const double a) { afanLow = a; UpdateAfanSlope(); }
0074   void setAfanHigh(const double a) { afanHigh = a; UpdateAfanSlope(); }
0075   void setZLow(const int z) { ZLow = z; UpdateAfanSlope(); }
0076   void setZHigh(const int z) { ZHigh = z; UpdateAfanSlope(); }
0077   double getAfanLow() const { return afanLow; }
0078   double getAfanHigh() const { return afanHigh; }
0079   int getZLow() const { return ZLow; }
0080   int getZHigh() const { return ZHigh; }
0081
0082 private:
0083
0084   void UpdateAfanSlope();
0085
0086   G4NuclearLevelData* fNucData;
0087
0088   double afanLow, afanHigh;
0089   int ZLow, ZHigh;
0090   double afanSlope;
0091
0092 };
0093
0094
0095 #endif