Import Geant4 11.0.0.beta source tree

2021-06-25 16:12:29 +02:00
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+//
+// ********************************************************************
+// * License and Disclaimer                                           *
+// *                                                                  *
+// * The  Geant4 software  is  copyright of the Copyright Holders  of *
+// * the Geant4 Collaboration.  It is provided  under  the terms  and *
+// * conditions of the Geant4 Software License,  included in the file *
+// * LICENSE and available at  http://cern.ch/geant4/license .  These *
+// * include a list of copyright holders.                             *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.  Please see the license in the file  LICENSE  and URL above *
+// * for the full disclaimer and the limitation of liability.         *
+// *                                                                  *
+// * This  code  implementation is the result of  the  scientific and *
+// * technical work of the GEANT4 collaboration.                      *
+// * By using,  copying,  modifying or  distributing the software (or *
+// * any work based  on the software)  you  agree  to acknowledge its *
+// * use  in  resulting  scientific  publications,  and indicate your *
+// * acceptance of all terms of the Geant4 Software license.          *
+// ********************************************************************
+//
+//
+//
+// ----------------------------------------------------------------
+//      GEANT 4 class header file
+//
+//      History: first implementation, A. Feliciello, 20th May 1998
+//
+//      Note: this class is a generalization of the 
+//            G4PhaseSpaceDecayChannel one
+// ----------------------------------------------------------------
+#ifndef G4GeneralPhaseSpaceDecay_h
+#define G4GeneralPhaseSpaceDecay_h 1
+
+#include "G4ios.hh"
+#include "globals.hh"
+#include "G4VDecayChannel.hh"
+#include "G4HadronicException.hh"
+
+class G4GeneralPhaseSpaceDecay : public G4VDecayChannel
+{
+  public:
+    //Constructors 
+      G4GeneralPhaseSpaceDecay(G4int Verbose = 1);
+
+      G4GeneralPhaseSpaceDecay(const G4String& theParentName,
+			       G4double        theBR,
+			       G4int           theNumberOfDaughters,
+			       const G4String& theDaughterName1,
+			       const G4String& theDaughterName2 = "",
+			       const G4String& theDaughterName3 = "");
+
+      G4GeneralPhaseSpaceDecay(const G4String& theParentName,
+                               G4double        theParentMass,
+			       G4double        theBR,
+			       G4int           theNumberOfDaughters,
+			       const G4String& theDaughterName1,
+			       const G4String& theDaughterName2 = "",
+			       const G4String& theDaughterName3 = "");
+
+      G4GeneralPhaseSpaceDecay(const G4String& theParentName,
+                               G4double        theParentMass,
+			       G4double        theBR,
+			       G4int           theNumberOfDaughters,
+			       const G4String& theDaughterName1,
+			       const G4String& theDaughterName2 ,
+			       const G4String& theDaughterName3 ,
+			       const G4double * masses);
+
+      G4GeneralPhaseSpaceDecay(const G4String& theParentName,
+                               G4double        theParentMass,
+			       G4double        theBR,
+			       G4int           theNumberOfDaughters,
+			       const G4String& theDaughterName1,
+			       const G4String& theDaughterName2 ,
+			       const G4String& theDaughterName3 ,
+			       const G4String& theDaughterName4 ,
+			       const G4double * masses);
+
+    //  Destructor
+      virtual ~G4GeneralPhaseSpaceDecay();
+
+  public:
+     G4double GetParentMass() const;
+     void SetParentMass(const G4double aParentMass);
+     virtual G4DecayProducts* DecayIt(G4double mass=0.0);   
+     static G4double Pmx(G4double e, G4double p1, G4double p2);
+
+  protected:
+     G4DecayProducts* OneBodyDecayIt();
+     G4DecayProducts* TwoBodyDecayIt();
+     G4DecayProducts* ThreeBodyDecayIt();
+     G4DecayProducts* ManyBodyDecayIt();
+     
+  private:
+     G4double parentmass;
+     const G4double * theDaughterMasses;
+    
+};  
+
+
+
+inline G4double G4GeneralPhaseSpaceDecay::GetParentMass() const
+{
+  return parentmass;
+}
+
+inline void G4GeneralPhaseSpaceDecay::SetParentMass(const G4double aParentMass)
+{
+  parentmass = aParentMass;
+}
+
+
+
+inline
+ G4double G4GeneralPhaseSpaceDecay::Pmx(G4double e, G4double p1, G4double p2)
+{
+   // calculate momentum of daughter particles in two-body decay
+   if (e-p1-p2 < 0 )
+   {  
+     throw G4HadronicException(__FILE__, __LINE__, "G4GeneralPhaseSpaceDecay::Pmx energy in cms < mass1+mass2");	
+   }
+   G4double ppp = (e+p1+p2)*(e+p1-p2)*(e-p1+p2)*(e-p1-p2)/(4.0*e*e);
+   if (ppp>0) return std::sqrt(ppp);
+   else       return -1.;
+}
+
+#endif