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High-spin structures in the Xe-129 nucleus
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.ORCID iD: 0000-0002-1406-5695
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2016 (English)In: Physical Review C, ISSN 2469-9985, Vol. 93, no 6, 064315Article in journal (Refereed) PublishedText
Abstract [en]

High-spin states in the Xe-129 nucleus are studied with the reaction Sn-124(Be-9,4n) at a beam energy of 36 MeV. The level scheme is extended significantly. For the positive-parity band, the alpha = +1/2 and the alpha = -1/2 signature components are combined to form a complete band structure based on the 3/2(+) state with spin and parity up to 21/2(+). For the negative-parity band based on the 11/2(-) state, the alpha = +1/2 signature component is newly established and both the alpha = +1/2 and the alpha = -1/2 signature components also form a complete band structure up to the 35/2(-) state. The positive-and negative-parity bands are proposed to originate from nu d(3/2) 3/2(+)[402] and nu h(11/2)11/2(-)[505] Nilsson configurations, respectively. A backbending is observed in the negative-parity band, which originates from the alignments of two h(11/2) protons according to crank shell model calculations. Based on the total Routhian surface and quasiparticle triaxial rotor model calculations, the negative-parity band is interpreted as a triaxially deformed shape with gamma approximate to -30 degrees, while the positive-parity band is associated with. softness, in accordance with previous studies. In the high-spin states, three decoupled bands and one oblate band with gamma approximate to -60 degrees are newly identified. The systematics and other characteristics of these bands are discussed.

Place, publisher, year, edition, pages
American Physical Society , 2016. Vol. 93, no 6, 064315
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-189669DOI: 10.1103/PhysRevC.93.064315ISI: 000377803300006ScopusID: 2-s2.0-84975755355OAI: diva2:949073
Swedish Research Council, 621-2010-3694 621-2012-3805 621-2013-4323

QC 20160715

Available from: 2016-07-15 Created: 2016-07-11 Last updated: 2016-07-15Bibliographically approved

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