Citation: Yang Wu, Xiongxin Dai, Shan Xing, Maoyi Luo, Marcus Christl, Hans-Arno Synal, Shaochun Hou. Direct search for primordial ²⁴⁴Pu in Bayan Obo bastnaesite[J]. Chinese Chemical Letters, ;2022, 33(7): 3522-3526. doi: 10.1016/j.cclet.2022.03.036 shu

Direct search for primordial ²⁴⁴Pu in Bayan Obo bastnaesite

Yang Wu ^a ,
Xiongxin Dai ^{a, b, *,} ,
Shan Xing ^a ,
Maoyi Luo ^{a, b} ,
Marcus Christl ^c ,
Hans-Arno Synal ^c ,
Shaochun Hou ^d

a.
China Institute for Radiation Protection, Taiyuan 030006, China
b.
Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou 215006, China
c.
Laboratory of Ion Beam Physics, ETH Zurich, Zurich 8093, Switzerland
d.
Baotou Research Institute of Rare Earths, Baotou 014030, China

daixx@yahoo.com

Received Date: 26 January 2022
Revised Date: 9 March 2022
Accepted Date: 10 March 2022
Available Online: 13 March 2022

Figures(2)

The abundances of heavy elements produced in r-process nucleosynthesis in the early solar system need experimental verification. ²⁴⁴Pu 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 ²⁴⁴Pu signals at a concentration of 1.0 × 10⁻¹⁸ g/g in bastnaesite reported by Hoffman et al. in this study, the total primordial ²⁴⁴Pu in 450 g bastnaesite sample from Bayan Obo ore (China) was measured using ultra-sensitive compact accelerator mass spectrometry (AMS). As no ²⁴⁴Pu signal was detected, an upper limit for the ²⁴⁴Pu in our bastnaesite sample was estimated to be 2.1 × 10⁻²⁰ g/g at 99% confidence level.
- ²⁴⁴Pu,
- Initial abundance ratio of ²⁴⁴Pu/²³⁸U,
- AMS measurement,
- Pu radiochemistry analysis,
- Bastnaesite
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Direct search for primordial ²⁴⁴Pu in Bayan Obo bastnaesite