Abstract:
High-spin states in 169Re have been investigated by means of in-beam γ-ray spectroscopy techniques with the 144Sm(28Si, 1p2nγ)169Re reaction. X-γ and γ-γ-t coincidences, γ-ray anisotropies, and DCO ratios were measured. A strongly coupled band based on the 9/2-[514] Nilsson state and a decoupled band built on the h 9/2 intruder proton orbital (nominally 1/2-[541]) have been established. The AB neutron crossings are observed at ω = 0.23 and 0.27 MeV for the 9/2-[514] and 1/2-[541] bands, respectively. The 9/2-[514] band in 169Re shows the largest signature splitting at low spin among the odd-mass Re isotopes. Band properties of the AB neutron crossing frequencies, alignment gains, and signature splittings are discussed, and compared with those in the heavier odd-A Re isotopes. Additionally, a three-quasipariticle band is observed, and the π9/2 -[514] ⊗ νAE configuration is proposed tentatively.
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Received: 10 May 2002 / Accepted: 17 September 2002 / Published online: 19 November 2002
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Communicated by D. Schwalm
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Zhou, X., Oshima, M., Toh, Y. et al. Rotational bands in 169Re. Eur Phys J A 15, 285–289 (2002). https://doi.org/10.1140/epja/i2002-10076-x
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DOI: https://doi.org/10.1140/epja/i2002-10076-x