fissionedv.分裂adj.分裂的fissionn.分裂；裂变；【生】裂殖fission track dating method裂变径迹法年龄测定Fission isotope target tube裂变同位素靶管fission-product detection裂变产物的探测fission-product poisoning裂变产物中毒fission-product decay heat裂变产物衰变热fissionable nuclear material可裂变核物质fission-product irradiator裂变产物辐照器fission-track dating method分裂追踪测年法fission product contamination核分裂生成物污染fission fragment spectrometer裂变碎片谱仪