Solving the Puzzles of the Decay of the Heaviest Known Proton-Emitting Nucleus Bi-185

doi:10.1103/PhysRevLett.127.202501

	Solving the Puzzles of the Decay of the Heaviest Known Proton-Emitting Nucleus Bi-185
	Doherty, D. T.4,5; Andreyev, A. N.3,4; Seweryniak, D.2; Woods, P. J.1; Carpenter, M. P.2; Auranen, K.2,8; Ayangeakaa, A. D.2,11,12; Back, B. B.2; Bottoni, S.2,6,7; Canete, L.5
刊名	PHYSICAL REVIEW LETTERS
	2021-11-12
卷号	127 期号:20 页码:6
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.127.202501
通讯作者	Doherty, D. T.()
英文摘要	Two long-standing puzzles in the decay of Bi-185, the heaviest known proton-emitting nucleus are revisited. These are the nonobservation of the 9/2(-) state, which is the ground state of all heavier odd-A Bi isotopes, and the hindered nature of proton and alpha decays of its presumed 60-mu s 1/2(+) ground state. The Bi-185 nucleus has now been studied with the Mo-95(Nb-93, 3n) reaction in complementary experiments using the Fragment Mass Analyzer and Argonne Gas-Filled Analyzer at Argonne National Laboratory's ATLAS facility. The experiments have established the existence of two states in Bi-185; the short-lived T-1/2 = 2.8(-1.0)(+2.3) mu s, proton- and alpha-decaying ground state, and a 58(2)-mu s gamma-decaying isomer, the half-life of which was previously attributed to the ground state. The reassignment of the ground-state lifetime results in a proton-decay spectroscopic factor close to unity and represents the only known example of a ground-state proton decay to a daughter nucleus (Pb-184) with a major shell closure. The data also demonstrate that the ordering of low- and high-spin states in Bi-185 is reversed relative to the heavier odd-A Bi isotopes, with the intruder-based 1/2(+) configuration becoming the ground, similar to the lightest At nuclides.
资助项目	U.S. Department of Energy, Office of Nuclear Physics[DEAC02-06CH11357] ; U.S. Department of Energy, Office of Nuclear Physics[DE-FG02-94ER41041] ; U.S. Department of Energy, Office of Nuclear Physics[DE-FG02-97ER41033] ; STFC
WOS关键词	ALPHA-DECAY ; ISOTOPES ; STATES ; BI ; SPECTROSCOPY ; TL
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000719865300004
资助机构	U.S. Department of Energy, Office of Nuclear Physics ; STFC
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/139957]
专题	中国科学院近代物理研究所
通讯作者	Doherty, D. T.
作者单位	1.Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland 2.Argonne Natl Lab, Phys Div, Argonne, IL 60439 USA 3.Japan Atom Energy Agcy, Adv Sci Res Ctr, Ibaraki 3191195, Japan 4.Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England 5.Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England 6.INFN, Via Celoria 16, I-20133 Milan, Italy 7.Univ Milan, Via Celoria 16, I-20133 Milan, Italy 8.Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland 9.Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA 10.Chinese Acad Sci, Inst Modern Phys, CAS Key Lab High Precis Nucl Spect, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Doherty, D. T.,Andreyev, A. N.,Seweryniak, D.,et al. Solving the Puzzles of the Decay of the Heaviest Known Proton-Emitting Nucleus Bi-185[J]. PHYSICAL REVIEW LETTERS,2021,127(20):6.
APA	Doherty, D. T..,Andreyev, A. N..,Seweryniak, D..,Woods, P. J..,Carpenter, M. P..,...&Zhu, S..(2021).Solving the Puzzles of the Decay of the Heaviest Known Proton-Emitting Nucleus Bi-185.PHYSICAL REVIEW LETTERS,127(20),6.
MLA	Doherty, D. T.,et al."Solving the Puzzles of the Decay of the Heaviest Known Proton-Emitting Nucleus Bi-185".PHYSICAL REVIEW LETTERS 127.20(2021):6.