cal·i·for·ni·um /ˌkæləˈfɔrniəm/
  卡
  cal·i·for·ni·um /ˌkæləˈfɔrnɪəm/ 名詞
  鉲
  californium
       n : a radioactive transuranic element; discovered by bombarding
           curium with alpha particles [syn: Cf, atomic number 98]
  californium
  Symbol: Cf
  Atomic number: 98
  Atomic weight: (249)
  Radioactive metallic transuranic element. Belongs to actinoid series.
  Cf-251 has a half life of about 700 years. Nine isotopes are known.
  Cf-252 is an intense neutron source, which makes it an intense
  neutron source and gives it a use in neutron activation analysis
  and a possible use as a radiation source in medicine. First produced
  by Glenn T. Seaborg and associates in 1950.