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Fine structure in the $$alpha$$ decay of $$^{223}$$U

$$^{223}$$Uの$$alpha$$崩壊

Sun, M. D.*; Liu, Z.*; Huang, T. H.*; Zhang, W. Q.*; Andreyev, A. N.; Ding, B.*; Wang, J. G.*; Liu, X. Y.*; Lu, H. Y.*; Hou, D. S.*; Gan, Z. G.*; Ma, L.*; Yang, H. B.*; Zhang, Z. Y.*; Yu, L.*; Jiang, J.*; Wang, K. L.*; Wang, Y. S.*; Liu, M. L.*; Li, Z. H.*; Li, J.*; Wang, X.*; Feng, A. H.*; Lin, C. J.*; Sun, L. J.*; Ma, L. J.*; Zuo, W.*; Xu, H. S.*; Zhou, X. H.*; Xiao, G. Q.*; Qi, C.*; Zhang, F. S.*

Sun, M. D.*; Liu, Z.*; Huang, T. H.*; Zhang, W. Q.*; Andreyev, A. N.; Ding, B.*; Wang, J. G.*; Liu, X. Y.*; Lu, H. Y.*; Hou, D. S.*; Gan, Z. G.*; Ma, L.*; Yang, H. B.*; Zhang, Z. Y.*; Yu, L.*; Jiang, J.*; Wang, K. L.*; Wang, Y. S.*; Liu, M. L.*; Li, Z. H.*; Li, J.*; Wang, X.*; Feng, A. H.*; Lin, C. J.*; Sun, L. J.*; Ma, L. J.*; Zuo, W.*; Xu, H. S.*; Zhou, X. H.*; Xiao, G. Q.*; Qi, C.*; Zhang, F. S.*

Fine structure in the $$alpha$$ decay of $$^{223}$$U was observed in the fusion-evaporation reaction $$^{187}$$Re($$^{40}$$Ar,p3n) by using fast digital pulse processing technique. Two $$alpha$$-decay branches of $$^{223}$$U feeding the ground state and 244 keV excited state of $$^{219}$$Th were identified by establishing the decay chain $$^{223}$$U$$rightarrow$$$$^{219}$$Th$$rightarrow$$$$^{215}$$Ra$$rightarrow$$$$^{211}$$Rn. The $$alpha$$-particle energy for the ground-state to ground-state transition of $$^{223}$$U was determined to be 8993(17) keV, 213 keV higher than the previous value, the half-life was updated to be 62$$^{+14}_{-10} mu$$s. Evolution of nuclear structure for $$N$$=131 even-$$Z$$ isotones from Po to U was discussed in the frameworks of nuclear mass and reduced $$alpha$$-decay width, a weakening octupole deformation in the ground state of $$^{223}$$U relative to its lighter isotones $$^{219}$$Ra and $$^{211}$$Th was suggested.

使用言語

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English

掲載資料名

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Physics Letters B

巻

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800

号

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ページ数

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p.135096_1 - 135096_5

発行年月

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2020/01

発表会議名

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開催年月

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開催都市

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開催国

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キーワード

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Fine Structure; ALPHA Decay; Quadrupole-octupole deformation

特許データ

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PDF

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論文URL

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https://doi.org/10.1016/j.physletb.2019.135096

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研究データの公開先DOI

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使用施設

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広報プレスリリース

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論文解説記事
(成果普及情報誌)

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受委託・共同研究相手機関

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Access

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- Accesses

InCites™

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パーセンタイル：83.19

分野：Astronomy & Astrophysics

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