Multi-quasiparticle states and K -forbidden transitions in 183Os

T. Shizuma; K. Matsuura; Y. Toh; Y. Hayakawa; M. Oshima; Y. Hatsukawa; M. Matsuda; K. Furuno; Y. Sasaki; T. Komatsubara; Y. R. Shimizu

doi:10.1016/S0375-9474(01)01210-6

Multi-quasiparticle states and K -forbidden transitions in ¹⁸³Os

T. Shizuma, K. Matsuura, Y. Toh, Y. Hayakawa, M. Oshima, Y. Hatsukawa, M. Matsuda, K. Furuno, Y. Sasaki, T. Komatsubara, Y. R. Shimizu

Experimental Particle Physics

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19 Citations (Scopus)

Abstract

High-spin states in ¹⁸³Os have been studied using the ¹⁷⁰Er(¹⁸O,5n) reaction at a beam energy of 85 MeV. Nine rotational bands based on 1-, 3-, 5- and 7-quasiparticle excitations have been observed. Nilsson configurations are assigned for the newly observed bands using g-factors deduced from M1/E2 branching ratios within the bands. In addition, two isomers with K^π=(43/2⁺) and (43/2^-) have been identified. The K^π=(43/2⁺) isomer decays directly to the K^π=9/2⁺ ground-state band with a large difference in the K quantum number, ΔK=17. The decay rates are discussed in terms of a tunneling model where high-K (isomeric) and low-K states interact via fluctuations towards triaxial nuclear shapes.

Original language	English
Pages (from-to)	337-370
Number of pages	34
Journal	Nuclear Physics A
Volume	696
Issue number	3-4
DOIs	https://doi.org/10.1016/S0375-9474(01)01210-6
Publication status	Published - Dec 31 2001

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1016/S0375-9474(01)01210-6

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title = "Multi-quasiparticle states and K -forbidden transitions in 183Os",

abstract = "High-spin states in 183Os have been studied using the 170Er(18O,5n) reaction at a beam energy of 85 MeV. Nine rotational bands based on 1-, 3-, 5- and 7-quasiparticle excitations have been observed. Nilsson configurations are assigned for the newly observed bands using g-factors deduced from M1/E2 branching ratios within the bands. In addition, two isomers with Kπ=(43/2+) and (43/2-) have been identified. The Kπ=(43/2+) isomer decays directly to the Kπ=9/2+ ground-state band with a large difference in the K quantum number, ΔK=17. The decay rates are discussed in terms of a tunneling model where high-K (isomeric) and low-K states interact via fluctuations towards triaxial nuclear shapes.",

author = "T. Shizuma and K. Matsuura and Y. Toh and Y. Hayakawa and M. Oshima and Y. Hatsukawa and M. Matsuda and K. Furuno and Y. Sasaki and T. Komatsubara and Shimizu, {Y. R.}",

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language = "English",

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TY - JOUR

T1 - Multi-quasiparticle states and K -forbidden transitions in 183Os

AU - Shizuma, T.

AU - Matsuura, K.

AU - Toh, Y.

AU - Hayakawa, Y.

AU - Oshima, M.

AU - Hatsukawa, Y.

AU - Matsuda, M.

AU - Furuno, K.

AU - Sasaki, Y.

AU - Komatsubara, T.

AU - Shimizu, Y. R.

PY - 2001/12/31

Y1 - 2001/12/31

N2 - High-spin states in 183Os have been studied using the 170Er(18O,5n) reaction at a beam energy of 85 MeV. Nine rotational bands based on 1-, 3-, 5- and 7-quasiparticle excitations have been observed. Nilsson configurations are assigned for the newly observed bands using g-factors deduced from M1/E2 branching ratios within the bands. In addition, two isomers with Kπ=(43/2+) and (43/2-) have been identified. The Kπ=(43/2+) isomer decays directly to the Kπ=9/2+ ground-state band with a large difference in the K quantum number, ΔK=17. The decay rates are discussed in terms of a tunneling model where high-K (isomeric) and low-K states interact via fluctuations towards triaxial nuclear shapes.

AB - High-spin states in 183Os have been studied using the 170Er(18O,5n) reaction at a beam energy of 85 MeV. Nine rotational bands based on 1-, 3-, 5- and 7-quasiparticle excitations have been observed. Nilsson configurations are assigned for the newly observed bands using g-factors deduced from M1/E2 branching ratios within the bands. In addition, two isomers with Kπ=(43/2+) and (43/2-) have been identified. The Kπ=(43/2+) isomer decays directly to the Kπ=9/2+ ground-state band with a large difference in the K quantum number, ΔK=17. The decay rates are discussed in terms of a tunneling model where high-K (isomeric) and low-K states interact via fluctuations towards triaxial nuclear shapes.

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DO - 10.1016/S0375-9474(01)01210-6

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SP - 337

EP - 370

JO - Nuclear Physics A

JF - Nuclear Physics A

SN - 0375-9474

IS - 3-4

ER -

Multi-quasiparticle states and K -forbidden transitions in ¹⁸³Os

Abstract

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