Measurement of 182Hf with HI-13 AMS system

Measurement of 182Hf with HI-13 AMS system
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使用 HI-13 AMS 系统测量 182Hf

DOI:
10.1016/j.nimb.2007.01.228
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发表时间:
2007-06
影响因子:
1.3
通讯作者:
--
中科院分区:
物理与天体物理4区
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--
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182Hf是一种已灭绝的放射性核素,半衰期约为(8.90 ± 0.09)Ma,自然界中只有超新星爆炸才能产生。182 Hf是少数几种半衰期在百万年范围内的放射性核素之一,用于追踪过去1亿年内地球附近可能发生的超新星事件。这可以通过在合适的地球档案中找到可测量的活182Hf痕迹来实现。利用加速器质谱(AMS),一种超灵敏的核分析技术,可以检测到微量的182 Hf。介绍了中国原子能科学研究院HI-13 AMS系统对182 Hf的探测方法和消除182 W干扰的化学措施
182Hf with half-life of about (8.90±0.09) Ma is an extinct radionuclide and can only be produced by a supernova explosion in nature. 182Hf is one of a few radionuclides in the million-year half-life range for tracing a possible supernova event in the vicinity of the Earth within the last 100 million years. This may be accomplished by finding measurable traces of live 182Hf in suitable terrestrial archives. With accelerator mass spectrometry (AMS), an ultra-sensitive nuclear analytical technique, it is possible to detect minute amounts of 182Hf. The detection method of 182Hf with HI-13 AMS system at China Institute of Atomic Energy (CIAE) and the chemical procedures to reduce 182W interference are presented
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