0.1 1.0 10.0 700 Ni 101 Fe 102 600 103 400 星 104 105 106 Cr 2300 0.1 1.0 10.0 S Ar Ca EkeVⅥ MgAI 200 Ne Fe-L 0 100 C N H+He H2 H 0.1 1.0 10.0 E[kev] Absorption cross section for material of cosmic abundances (Wilms,Allen McCray,2000)