+ Adding GetBindingEnergy() method to NPNucleus.h

NPLib/Physics/NPNucleus.h

@@ -121,6 +121,7 @@ namespace NPL {
     
     // Nuclear mass in MeV
     double      Mass() const {return (fAtomicWeight*amu_c2 + fMassExcess/1000. - fCharge*electron_mass_c2);}
+      double GetBindingEnergy() const {return (fCharge*proton_mass_c2 + (fAtomicWeight-fCharge)*neutron_mass_c2 + fCharge*electron_mass_c2 - fAtomicWeight*amu_c2 - fMassExcess/1000);}
     void        Print() const   ;
   };
 }