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Journal Articles

Multi-quasiparticle states and ${it K}$-forbidden transitions in $$^{183}$$Os

Shizuma, Toshiyuki; Matsuura, Katsuyuki*; Toh, Yosuke; Hayakawa, Takehito; Oshima, Masumi; Hatsukawa, Yuichi; Matsuda, Makoto; Furuno, Kohei*; Sasaki, Yasuyuki*; Komatsubara, Tetsuro*; et al.

Nuclear Physics A, 696(3-4), p.337 - 370, 2001/12

 Times Cited Count:18 Percentile:72.34(Physics, Nuclear)

High-spin states in $$^{183}$$Os 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=(43/2+) and (43/2-) have been identified. The K=(43/2+) isomer decays directly to the K=9/2+ ground state band with a large difference in the $$K$$ quantum number, $$mitDelta K=$$17. The decay rates are disccused 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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