Identification of excited states in Bi188 and Po188

Zhang, W. Q.; Andreyev, Andrei N.; Liu, Z.; Seweryniak, D.; Huang, H.; Li, Z. H.; Li, J. G.; Guo, C. Y.; Barzakh, A. E.; Van Duppen, P.; Al Monthery, M.; Andel, B.; Antalic, S.; Block, M.; Bronis, A.; Carpenter, M. P.; Copp, P.; Cubiss, J. G.; Ding, B.; Doherty, D. T.; Favier, Z.; Giacoppo, F.; Huang, T. H.; Kindler, B.; Kondev, F. G.; Lauritsen, T.; Li, G. S.; Lommel, B.; Lu, H. Y.; Mošať, P.; Niu, Y. F.; Raison, C.; Reviol, W.; Savard, G.; Stolze, S.; Wilson, G. L.; Wu, H. Y.; Wang, Z. H.; Xu, F. R.; Yu, X. H.; Zeng, Q. B.; Zhou, X. H.

doi:10.1103/physrevc.106.024317

Title: Identification of excited states in Bi 188 and Po 188

Journal Article · Wed Aug 17 00:00:00 EDT 2022 · Physical Review. C

DOI:https://doi.org/10.1103/physrevc.106.024317· OSTI ID:1909616

^[1];

^[2]; Liu, Z. ^[1]; Seweryniak, D. ^[3]; Huang, H. ^[1]; Li, Z. H. ^[4]; Li, J. G. ^[5]; Guo, C. Y. ^[4]; Barzakh, A. E. ^[6]; Van Duppen, P. ^[7]; Al Monthery, M. ^[8]; Andel, B. ^[9]; Antalic, S. ^[10]; Block, M. ^[11]; Bronis, A. ^[10]; Carpenter, M. P. ^[3]; Copp, P. ^[3]; Cubiss, J. G. ^[8]; Ding, B. ^[1]; Doherty, D. T. ^[12] more »

Chinese Academy of Sciences, Lanzhou (China); Univ. of Chinese Academy of Sciences, Beijing (China)
Univ. of York (United Kingdom); Japan Atomic Energy Agency, Tokai-mura (Japan)
Argonne National Lab. (ANL), Argonne, IL (United States)
Peking Univ., Beijing (China)
Chinese Academy of Sciences, Lanzhou (China)
Petersburg Nuclear Physics Inst., Gatchina (Russia)
KU Leuven (Belgium)
Univ. of York (United Kingdom)
KU Leuven (Belgium); Comenius Univ. in Bratislava (Slovakia)
Comenius Univ. in Bratislava (Slovakia)
Helmholtz-Inst. Mainz (Germany); GSI Helmholtzzentrum für Schwerionenforschung Darmstadt (Germany); Johannes-Gutenberg Univ., Mainz (Germany)
Univ. of Surrey, Guildford (United Kingdom)
Univ. Paris-Saclay, Gif-sur-Yvette (France)
Helmholtz-Inst. Mainz (Germany); GSI Helmholtzzentrum für Schwerionenforschung Darmstadt (Germany)
GSI Helmholtzzentrum für Schwerionenforschung Darmstadt (Germany)
Lanzhou Univ. (China)
Louisiana State Univ., Baton Rouge, LA (United States)

The neutron-deficient ¹⁸⁸Bi and ¹⁸⁸Po isotopes have been studied by γ-ray spectroscopy using the recoil-decay tagging technique with the Argonne Gas-Filled Analyzer. A new 0.25(5)-μs isomeric state and a prompt cascade formed by 319-, 366-, and 462-keV γ rays have been established on top of the (10¯) α -decaying isomer in ¹⁸⁸Bi. The first excited (2⁺) state in ¹⁸⁸Po was identified, its excitation energy of 242(2) keV continues the nearly constant trend for the first 2⁺ states in ^{190, 192,194}Po. Here, the state is most likely a member of a prolate rotational band built on the ground state, albeit mixing with other coexisting configurations cannot be excluded. The new results obtained in the present work provide new information to shape coexistence in bismuth and polonium isotopes near the neutron midshell at N = 104 . In this mass region, a reduction in the prompt γ-ray yield obtained with recoil decay tagging was observed for a few nuclides, and the possible reasons are presented.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); Chinese Academy of Sciences (CAS); National Key Basic Research Program of China; National Natural Science Foundation of China (NSFC); Universidad Nacional de Cordoba (UNC); Triangle Universities Nuclear Laboratory (TUNL); Slovak Research and Development Agency (SRDA)

Grant/Contract Number:: AC02-06CH11357; FG02-97ER41033; FG02-94ER41041

OSTI ID:: 1909616

Alternate ID(s):: OSTI ID: 1882379

Journal Information:: Physical Review. C, Vol. 106, Issue 2; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Identification of excited states in Bi 188 and Po 188

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