//* fission (used also for low energy neutrons) *
//* *
//*----------------------------------------------------------------------*
-//* *
+//
+
+//
+// TFluka specific:
+// ispusr[mkbmx2 - 1] : track index in vmcstack
+// ispusr[mkbmx2 - 2] : flag for "interrupted" track
+//
+
const Int_t mxtrck = 2500;
typedef struct {