* adding function to inelastic breakup for simulation

NPLib/Physics/NPInelasticBreakup.h

@@ -103,6 +103,7 @@ namespace NPL {
     double GetBeamEnergy() const { return fBeamEnergy; }
     double GetThetaCM() const { return fThetaCM; }
     double GetQValue() const { return fQValue; }
+    Particle* GetParticleBeam() { return &fBeam; }
     Particle* GetParticle1() { return &fParticle1; }
     Particle* GetParticle2() { return &fParticle2; }
     Particle* GetParticle3() { return &fParticle3; }