G4VhShellCrossSection.cc

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00025 //
00026 // $Id: G4UAtomicDeexcitation.cc,v 1.11 
00027 // GEANT4 tag $Name: not supported by cvs2svn $
00028 //
00029 // -------------------------------------------------------------------
00030 //
00031 // GEANT4 Class file
00032 //
00033 //
00034 // File name:     G4VhShellCrossSection
00035 //
00036 // Author:        V.Ivanchenko (Vladimir.Ivanchenko@cern.ch)
00037 // 
00038 // History:
00039 // -----------
00040 // 20 Oct 2001 V.Ivanchenko   1st implementation
00041 // 24 Oct 2001 MGP            Minor clean-up
00042 // 29 Oct 2001 VI             Add delta energy
00043 //
00044 // -------------------------------------------------------------------
00045 
00046 #include "G4VhShellCrossSection.hh"
00047 #include "Randomize.hh"
00048 
00049 G4VhShellCrossSection::G4VhShellCrossSection(const G4String& xname):name(xname)
00050 {}
00051 
00052 G4VhShellCrossSection::~G4VhShellCrossSection() 
00053 {}
00054 
00055 void G4VhShellCrossSection :: SetTotalCS(G4double)
00056 {}
00057 
00058 G4int G4VhShellCrossSection::SelectRandomShell(G4int Z, 
00059                                                G4double incidentEnergy,
00060                                                G4double mass, 
00061                                                G4double deltaEnergy,
00062                                                const G4Material* mat)
00063 //  returns the shell ionized if the shell exists. If the shell is not counted, it returns -1
00064 
00065 {
00066   std::vector<G4double> p = Probabilities(Z,incidentEnergy,mass,deltaEnergy,mat);
00067   G4int shell = -1;
00068   size_t nShells = p.size();
00069   G4double q = G4UniformRand();
00070   for (size_t i=0; i<nShells; i++) {
00071     
00072     if (p[i] >= q) {
00073       shell = i;
00074       break;
00075     }
00076     q -= p[i];
00077   }
00078   return shell;
00079 }
00080 
00081 

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