Import Geant4 8.1.0 source tree

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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.          *
+// ********************************************************************
+//
+//
+// $Id: G4HadronElastic.hh,v 1.11 2006/06/29 20:09:03 gunter Exp $
+// GEANT4 tag $Name: geant4-08-01 $
+//
+//
+// G4 Model: Low energy elastic scattering with 4-momentum balance 
+// Derived fron G4LElastic of F.W. Jones, TRIUMF, 04-JUN-96
+// Uses  G4ElasticHadrNucleusHE and G4VQCrossSection
+//  
+// Modified:
+// 14-Dec-05 V.Ivanchenko rename the class
+// 13-Apr-06 V.Ivanchenko move to coherent_elastic 
+//
+//
+// Class Description
+// Final state production model for hadron nuclear elastic scattering; 
+// Class Description - End
+
+
+#ifndef G4HadronElastic_h
+#define G4HadronElastic_h 1
+ 
+#include "globals.hh"
+#include "G4HadronicInteraction.hh"
+#include "G4HadProjectile.hh"
+#include "G4Nucleus.hh"
+
+enum G4ElasticGenerator
+{
+  fLElastic = 0,
+  fHElastic,
+  fQElastic,
+  fSWave
+};
+
+class G4ParticleDefinition;
+class G4VQCrossSection;
+class G4ElasticHadrNucleusHE;
+
+class G4HadronElastic : public G4HadronicInteraction
+{
+public:
+
+  G4HadronElastic(G4double elim = 100.*keV, 
+		  G4double plow = 20.*MeV, 
+		  G4double ehigh= DBL_MAX);
+
+  virtual ~G4HadronElastic();
+ 
+  G4HadFinalState * ApplyYourself(const G4HadProjectile & aTrack, 
+				  G4Nucleus & targetNucleus);
+
+  G4VQCrossSection* GetCS();
+
+  G4ElasticHadrNucleusHE* GetHElastic();
+
+  void SetMomentumLow(G4double value);
+
+  void SetKinEnergyHigh(G4double value);
+
+  G4double SampleT(G4double p, G4double m1, G4double m2, G4double A);
+
+private:
+
+  G4int Rtmi(G4double* x, G4double xli, G4double xri, G4double eps, 
+	     G4int iend,
+	     G4double aa, G4double bb, G4double cc, G4double dd, 
+	     G4double rr);
+
+  G4double Fctcos(G4double t, 
+		  G4double aa, G4double bb, G4double cc, G4double dd, 
+		  G4double rr);
+
+  void Defs1(G4double p, G4double px, G4double py, G4double pz, 
+	     G4double pxinc, G4double pyinc, G4double pzinc, 
+	     G4double* pxnew, G4double* pynew, G4double* pznew);
+
+  G4VQCrossSection*           qCManager;
+  G4ElasticHadrNucleusHE*     hElastic;
+
+  const G4ParticleDefinition* theProton;
+  const G4ParticleDefinition* theNeutron;
+  const G4ParticleDefinition* theDeuteron;
+  const G4ParticleDefinition* theAlpha;
+
+  G4double ekinlim;  // in MeV
+  G4double plablow;  // in MeV/c
+  G4double ekinhigh;  // in MeV/c
+};
+
+inline void G4HadronElastic::SetMomentumLow(G4double value)
+{
+  plablow = value;
+}
+
+inline void G4HadronElastic::SetKinEnergyHigh(G4double value)
+{
+  ekinhigh = value;
+}
+
+#endif