add geant4 scene and gcompose app

src/HEP/Geant/PhysicsList.cpp

@@ -0,0 +1,22 @@
+#include "PhysicsList.hh"
+
+#include "G4DecayPhysics.hh"
+#include "G4EmStandardPhysics.hh"
+#include "G4RadioactiveDecayPhysics.hh"
+
+PhysicsList::PhysicsList() : G4VModularPhysicsList() {
+  SetVerboseLevel(1);
+
+  // Default physics
+  RegisterPhysics(new G4DecayPhysics());
+
+  // EM physics
+  RegisterPhysics(new G4EmStandardPhysics());
+
+  // Radioactive decay
+  RegisterPhysics(new G4RadioactiveDecayPhysics());
+}
+
+PhysicsList::~PhysicsList() {}
+
+void PhysicsList::SetCuts() { G4VModularPhysicsList::SetCuts(); }