Spectroscopy of the neutron-deficient nucleus Os-167(91)

D. O'Donnell, T. Grahn, D. T. Joss, J. Simpson, C. Scholey, K. Andgren, L. Bianco, B. Cederwall, D. M. Cullen, A. Dewald, E. Ganioglu, M. B. Gomez Hornillos, P. T. Greenlees, B. Hadinia, H. Iwasaki, U. Jakobsson, J. Jolie, P. Jones, D. S. Judson, R. JulinS. Juutinen, S. Ketelhut, M. Labiche, M. Leino, N. M. Lumley, P. J. R. Mason, O. Möller, P. Nieminen, M. Nyman, R. D. Page, J. Pakarinen, E. S. Paul, M. Petri, A. Petts, P. Peura, N. Pietralla, Th. Pissulla, P. Rahkila, P. Ruotsalainen, M. Sandzelius, P. J. Sapple, J. Saren, J. Sorri, J. Thomson, J. Uusitalo, H. V. Watkins

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6 Citations (Scopus)


Excited states of the nucleus 167Os have been populated by the reaction 92Mo(78Kr,2pn). The JUROGAM γ-ray detector array has been used in conjunction with the RITU gas-filled separator and the GREAT spectrometer to observe prompt γ rays in coincidence with recoiling fusion-evaporation residues and their subsequent decay by α particle emission. By correlating prompt γ radiation with the characteristic α radioactivity of 167Os, 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 τ=20(4) ps for The Iπ=17/2+ state in 167Os. Hence, the level of collectivity and magnitude of deformation of the low spin yrast band of this nucleus is established.
Original languageEnglish
Article number064309
JournalPhysical Review C
Issue number6
Publication statusPublished - 10 Jun 2009
Externally publishedYes


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