Identification of excited states in Os-167 and Os-168: shape coexistence at extreme neutron deficiency
2001 (English)In: Nuclear Physics A, ISSN 0375-9474, Vol. 689, no 04-mar, 631-654 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
Elsevier, 2001. Vol. 689, no 04-mar, 631-654 p.
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, gamma-ray spectroscopy, rare-earth nuclei, high-spin, hg isotopes, yrast line, band, alignment, decay, even
IdentifiersURN: urn:nbn:se:kth:diva-20721DOI: 10.1016/S0375-9474(00)00692-8ISI: 000169382000002OAI: oai:DiVA.org:kth-20721DiVA: diva2:339417
QC 201005252010-08-102010-08-102015-04-29Bibliographically approved