Gabriele Cosmo
133 lines
4.9 KiB
C++
133 lines
4.9 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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//
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// ----------------------------------------------------------------
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// GEANT 4 class header file
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//
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// History: first implementation, A. Feliciello, 20th May 1998
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//
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// Note: this class is a generalization of the
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// G4PhaseSpaceDecayChannel one
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// ----------------------------------------------------------------
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#ifndef G4GeneralPhaseSpaceDecay_h
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#define G4GeneralPhaseSpaceDecay_h 1
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#include "G4ios.hh"
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#include "globals.hh"
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#include "G4VDecayChannel.hh"
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#include "G4HadronicException.hh"
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class G4GeneralPhaseSpaceDecay : public G4VDecayChannel
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{
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public:
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//Constructors
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G4GeneralPhaseSpaceDecay(G4int Verbose = 1);
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G4GeneralPhaseSpaceDecay(const G4String& theParentName,
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G4double theBR,
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G4int theNumberOfDaughters,
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const G4String& theDaughterName1,
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const G4String& theDaughterName2 = "",
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const G4String& theDaughterName3 = "");
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G4GeneralPhaseSpaceDecay(const G4String& theParentName,
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G4double theParentMass,
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G4double theBR,
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G4int theNumberOfDaughters,
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const G4String& theDaughterName1,
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const G4String& theDaughterName2 = "",
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const G4String& theDaughterName3 = "");
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G4GeneralPhaseSpaceDecay(const G4String& theParentName,
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G4double theParentMass,
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G4double theBR,
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G4int theNumberOfDaughters,
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const G4String& theDaughterName1,
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const G4String& theDaughterName2 ,
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const G4String& theDaughterName3 ,
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const G4double * masses);
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G4GeneralPhaseSpaceDecay(const G4String& theParentName,
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G4double theParentMass,
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G4double theBR,
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G4int theNumberOfDaughters,
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const G4String& theDaughterName1,
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const G4String& theDaughterName2 ,
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const G4String& theDaughterName3 ,
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const G4String& theDaughterName4 ,
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const G4double * masses);
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// Destructor
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virtual ~G4GeneralPhaseSpaceDecay();
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public:
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G4double GetParentMass() const;
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void SetParentMass(const G4double aParentMass);
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virtual G4DecayProducts* DecayIt(G4double mass=0.0);
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static G4double Pmx(G4double e, G4double p1, G4double p2);
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protected:
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G4DecayProducts* OneBodyDecayIt();
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G4DecayProducts* TwoBodyDecayIt();
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G4DecayProducts* ThreeBodyDecayIt();
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G4DecayProducts* ManyBodyDecayIt();
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private:
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G4double parentmass;
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const G4double * theDaughterMasses;
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};
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inline G4double G4GeneralPhaseSpaceDecay::GetParentMass() const
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{
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return parentmass;
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}
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inline void G4GeneralPhaseSpaceDecay::SetParentMass(const G4double aParentMass)
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{
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parentmass = aParentMass;
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}
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inline
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G4double G4GeneralPhaseSpaceDecay::Pmx(G4double e, G4double p1, G4double p2)
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{
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// calculate momentum of daughter particles in two-body decay
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if (e-p1-p2 < 0 )
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{
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throw G4HadronicException(__FILE__, __LINE__, "G4GeneralPhaseSpaceDecay::Pmx energy in cms < mass1+mass2");
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}
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G4double ppp = (e+p1+p2)*(e+p1-p2)*(e-p1+p2)*(e-p1-p2)/(4.0*e*e);
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if (ppp>0) return std::sqrt(ppp);
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else return -1.;
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}
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#endif
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