【摘要】 综述了４１Ｃａ的起源、加速器质谱计测量的特点以及４１Ｃａ在地质年龄测定中的应用。４１Ｃａ半衰期为１０５ａ，它可用来测定５×１０４～１０６ａ地质样品的年龄。天然样品中ｗ（４１Ｃａ）／ｗ（４０Ｃａ）比值很小，只能用ＡＭＳ测定。目前，检测ｗ（４１Ｃａ）／ｗ（４０Ｃａ）比值的灵敏度可达１０－１５。在全球气候变化、古人类学研究及医学示踪研究中应用４１Ｃａ具有非常重要的意义。更多还原

【Abstract】 41Ca is a cosmogenic radioisotope with a halflife of 105 years.The most suitable application of 41Ca is dating geological sample at the interval of 5×104—106 years.w(41Ca)/w(40Ca) ratio in natural sample is very low and it can be only measured by AMS.Actually,the sensitivity of detecting w(41Ca)/w(40Ca)ratio reachs 10-15.The application of 41Ca is very important for global climate change studies,palaeoanthropology studies and medical tracing.更多还原