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New high-spin isomer and quasiparticle-vibration coupling in Ir-187

AuthorsAlgora, Alejandro ; Modamio, V. ; Jungclaus, Andrea ; Bazzacco, D.; Escrig, Diego ; Fraile, Luis M. ; Lenzi, Silvia M.; Marginean, N.; Martinez, T.; Napoli, D. R.; Schwengner, R.; Ur, C. A.
Issue Date12-May-2010
PublisherAmerican Physical Society
CitationPhysical Review - Section C - Nuclear Physics 81 (5): 054304 (2010)
AbstractThe high-spin structure of the Z = 77 nucleus Ir-187 has been studied using the fusion-evaporation reaction W-186(Li-7, (6)n) at a beam energy of 59 MeV. The excitation scheme of this nucleus has been extended by more than 110 new states, including extensions of all previously established rotational bands. The band crossing region of the h(9/2) negative-parity yrast band has been revised and new intrinsic high-K states have been identified. In particular, a 29/2(-) isomeric state [T-1/2 = 1.8(5)mu s] at an excitation energy of 2487 keV has been observed for the first time, and on top of it, a rich level scheme reaching up to spin (59/2(-)) and excitation energies around 7 MeV has been established.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevC.81.054304
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