Identification of excited states in 167Os and 168Os:: shape coexistence at extreme neutron deficiency

被引：33
作者：
Joss, DT
King, SL
Page, RD
Simpson, J
Keenan, A
Amzal, N
Bäck, T
Bentley, MA
Cederwall, B
Cocks, JFC
Cullen, DM
Greenlees, PT
Helariutta, K
Jones, PM
Julin, R
Juutinen, S
Kankaanpää, H
Kettunen, H
Kuusiniemi, P
Leino, M
Muikku, M
Savelius, A
Uusitalo, J
Williams, SJ
机构：
[1] Staffordshire Univ, Sch Sci, Stoke On Trent ST4 2DE, Staffs, England
[2] Univ Jyvaskyla, Dept Phys, FIN-40351 Jyvaskyla, Finland
[3] Royal Inst Technol, S-10405 Stockholm, Sweden
[4] SERC, Daresbury Lab, CLRC, Warrington WA4 4AD, Cheshire, England
[5] Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England
来源：
NUCLEAR PHYSICS A | 2001年 / 689卷 / 3-4期
基金：
芬兰科学院; 英国工程与自然科学研究理事会;
关键词：
Sn-112 (Ni-58, 2p),(Ni-58,n2p); E=266 MeV; measured E gamma; I gamma-; gamma gamma-coincidence; Os-167.168 deduced high-spin levels; J; pi; configurations; shape coexistence; jurosphere spectrometer; gas-filled separator; cranked mean-field calculations;
D O I：
10.1016/S0375-9474(00)00692-8
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Excited states in the very neutron-deficient isotopes Os-167 and Os-168 have been observed using the reaction Sn-112(Ni-58, 2pxn). The JUROSPHERE gamma -ray spectrometer array was used in conjunction with the RITU gas-filled recoil separator to collect prompt gamma radiation in coincidence with recoils implanted in a silicon strip detector located at the focal plane of RITU. Using a selective recoil decay tagging technique it has been possible to unambiguously assign gamma -ray transitions to Os-167 and Os-168 through the characteristic a radioactivity of these nuclides. The high-spin structure of the bands is discussed in terms of quasiparticle configurations within the framework of the cranked shell model. The role of shape coexistence in Os-168 is examined with phenomenological three-band mixing calculations. (C) 2001 Elsevier Science B.V. All rights reserved.
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页码：631 / 654
页数：24
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