Direct search for primordial ~(244)Pu in Bayan Obo bastnaesite
Direct search for primordial ~(244)Pu in Bayan Obo bastnaesite
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DOI：
10.1016/j.cclet.2022.03.036
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Hou Shaochun
中科院分区：
文献类型：
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作者：
Wu Yang;Dai Xiongxin;Xing Shan;Luo Maoyi;Christl Marcus;Synal Hansarno;Hou Shaochun
The abundances of heavy elements produced in r-process nucleosynthesis in the early solar system need experimental verification. ~(244)Pu could be the heaviest primordial nuclide produced before the formation of the Earth still being detectable today. As recent attempts failed to confirm the discovery of ~(244)Pu signals at a concentration of 1.0×10~(–18) g/g in bastnaesite reported by Hoffman et al. in this study, the total primordial ~(244)Pu in 450 g bastnaesite sample from Bayan Obo ore (China) was measured using ultrasensitive compact accelerator mass spectrometry (AMS). As no ~(244)Pu signal was detected, an upper limit for the ~(244)Pu in our bastnaesite sample was estimated to be 2.1×10~(–20) g/g at 99% confidence level.
