00001 /* BDSIM code. Version 1.0 00002 Author: Grahame A. Blair, Royal Holloway, Univ. of London. 00003 Last modified 24.7.2002 00004 Copyright (c) 2002 by G.A.Blair. ALL RIGHTS RESERVED. 00005 */ 00006 #ifndef BDSPlanckEngine_h 00007 #define BDSPlanckEngine_h 1 00008 00009 #include "G4ios.hh" 00010 #include "globals.hh" 00011 #include "G4LorentzVector.hh" 00012 00013 #include "CLHEP/Units/PhysicalConstants.h" 00014 00015 class BDSPlanckEngine 00016 { 00017 public: 00018 00019 BDSPlanckEngine(G4double aTemperature); 00020 00021 ~BDSPlanckEngine(); 00022 00023 G4LorentzVector PerformPlanck(); 00024 void SetTemperature(G4double aTemperature); 00025 00026 protected: 00027 00028 private: 00029 00030 G4double PlanckSpectrum(G4double x); 00031 00032 private: 00033 G4double itsTemperature, kT; 00034 G4LorentzVector itsFourMom; 00035 00036 G4double a,b,c,x1,x2,TotalArea,area1, area2, area3; 00037 00038 const static G4int ntryMax = 10000000; 00039 00040 }; 00041 00042 00043 inline void BDSPlanckEngine::SetTemperature(G4double aTemperature) 00044 { 00045 itsTemperature=aTemperature; 00046 kT=CLHEP::k_Boltzmann* itsTemperature; 00047 } 00048 00049 inline G4double BDSPlanckEngine::PlanckSpectrum(G4double x) 00050 { return x*x/(exp(x)-1);} 00051 00052 #endif
1.4.7