*.Nsum 3D

The file format is

VG VD VS N_regions nfree(1)->nfree(N) pfree(1)->pfree(N) NDA(1)->NDA(N) G(1)->G(N) R(1)-R(N) R_nonRad(1)-> R_nonRad(N) Auger(1)->Auger(N), gen(1)->gen(N) Rad_hh(1) -> Rad_hh(N) Rad_lh(1) -> Rad_lh(N) impactG(1) -> impactG(N)