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Spectroscopy of the neutron-deficient nucleus Os-167(91)
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2009 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 79, no 6Article in journal (Refereed) Published
Abstract [en]

Excited states of the nucleus Os-167 have been populated by the reaction Mo-92(Kr-78,2pn). The JUROGAM gamma-ray detector array has been used in conjunction with the RITU gas-filled separator and the GREAT spectrometer to observe prompt gamma rays in coincidence with recoiling fusion-evaporation residues and their subsequent decay by alpha particle emission. By correlating prompt gamma radiation with the characteristic alpha radioactivity of Os-167, it has been possible to extend the level scheme for this nucleus significantly. In particular, an extension of the yrast band and four previously unobserved bands are reported. In addition, the recoil distance Doppler-shift method was used to determine a lifetime of tau=20(4) ps for The I-pi=17/2(+) state in Os-167. Hence, the level of collectivity and magnitude of deformation of the low spin yrast band of this nucleus is established.



Place, publisher, year, edition, pages
2009. Vol. 79, no 6
Keyword [en]
gamma-ray spectroscopy, high-spin states, shape coexistence, quadrupole-moments, mean-field, os-172, alignment, isotopes, band
URN: urn:nbn:se:kth:diva-18576DOI: 10.1103/PhysRevC.79.064309ISI: 000267701200020ScopusID: 2-s2.0-67549132688OAI: diva2:336623
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2011-02-03Bibliographically approved

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Andgren, KarinCederwall, BoGanioglu, ElaHadinia, BaharakSandzelius, Mikael
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