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Systematics of high-spin isomers in N=83 isotones and a high-spin isomer beam
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2002 (English)In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 13, no 02-jan, 5-8 p.Article in journal (Refereed) Published
Abstract [en]

Isomers in N = 83 isotones of Z = 60 66 were studied systematically. Their spins and parities arc,49/2(+) and 27(+) for odd and odd-odd nuclei, respectively. Nearly constant excitation energies of these isomers indicated a decrease of a Z = 64 shell gap energy as Z decreases from 64 to 60 within the framework of a deformed independent-particle model (DIPM). Their configurations are [v(f(tau/2)h(9/2)i(13/2)), pi(h(11/2))(2)](49/2+) and [v(f(7/2)h(9/2)i(13/2)), pi(h(11/2))(2)(d(5/2))(-1)](27+) for odd and odd-odd nuclei, respectively. The shape of the yrast status changes suddenly at spin 49/2(odd) and 27(odd-odd) from a near spherical to an oblate shape. Transitions from isomers are highly hindered because of the shape changes. They may be categorized to be shape isomers. The development of a secondary beam produced by using these high-spin isomers is also described.

Place, publisher, year, edition, pages
2002. Vol. 13, no 02-jan, 5-8 p.
Keyword [en]
level structure, gamma-ray, states
URN: urn:nbn:se:kth:diva-21503ISI: 000175310300004OAI: diva2:340201
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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