Import Geant4 0.0.0 source tree

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+// This code implementation is the intellectual property of
+// the RD44 GEANT4 collaboration.
+//
+// By copying, distributing or modifying the Program (or any work
+// based on the Program) you indicate your acceptance of this statement,
+// and all its terms.
+//
+// $Id: G4PhaseSpaceDecayChannel.hh,v 2.4 1998/11/18 09:46:05 kurasige Exp $
+// GEANT4 tag $Name: geant4-00 $
+//
+//
+// ------------------------------------------------------------
+//      GEANT 4 class header file
+//
+//      For information related to this code contact:
+//      CERN, CN Division, ASD group
+//      History: first implementation, based on object model of
+//      27 July 1996 H.Kurashige
+//      30 May 1997 H.Kurashige
+// ------------------------------------------------------------
+#ifndef G4PhaseSpaceDecayChannel_h
+#define G4PhaseSpaceDecayChannel_h 1
+
+#include "G4ios.hh"
+#include "globals.hh"
+#include "G4VDecayChannel.hh"
+
+class G4PhaseSpaceDecayChannel :public G4VDecayChannel
+{
+  public:
+    //Constructors 
+      G4PhaseSpaceDecayChannel(G4int Verbose = 1);
+      G4PhaseSpaceDecayChannel(const G4String& theParentName,
+			       G4double        theBR,
+			       G4int           theNumberOfDaughters,
+			       const G4String& theDaughterName1,
+			       const G4String& theDaughterName2 = "",
+			       const G4String& theDaughterName3 = "",
+			       const G4String& theDaughterName4 = ""   );
+
+    //  Destructor
+      virtual ~G4PhaseSpaceDecayChannel();
+
+  public:
+     virtual G4DecayProducts *DecayIt(G4double);   
+     static G4double Pmx(G4double e, G4double p1, G4double p2);
+
+  private: 
+     G4DecayProducts *OneBodyDecayIt();
+     G4DecayProducts *TwoBodyDecayIt();
+     G4DecayProducts *ThreeBodyDecayIt();
+     G4DecayProducts *ManyBodyDecayIt();
+};  
+
+inline
+ G4double G4PhaseSpaceDecayChannel::Pmx(G4double e, G4double p1, G4double p2)
+{
+   // calcurate momentum of daughter particles in two-body decay
+   G4double ppp = (e+p1+p2)*(e+p1-p2)*(e-p1+p2)*(e-p1-p2)/(4.0*e*e);
+   if (ppp>0) return sqrt(ppp);
+   else       return -1.;
+}
+
+#endif