鐦者,亦作鉲,化學元素也,符號Cf,原子序九十八,屬錒系,人造元素也。其可放射中子以豐盈,故可用於中子透視、中子探傷云。
鐦之同位素凡二十,自鐦二三七至鐦二五六,皆具放射性。性至穏者鐦二五一,每八百九十八年折半,次穩者鐦二四九,每三百五十一年折半。餘者之半衰期,未有逾百年者。
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