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Rotational band properties of $$^{173}$$W

Wang, H. X.*; Zhang, Y. H.*; Zhou, X. H.*; Liu, M. L.*; Ding, B.*; Li, G. S.*; Hua, W.*; Zhou, H. B.*; Guo, S.*; Qiang, Y. H.*; Oshima, Masumi*; Koizumi, Mitsuo; Toh, Yosuke  ; Kimura, Atsushi; Harada, Hideo  ; Furutaka, Kazuyoshi; Kitatani, Fumito; Nakamura, Shoji; Hatsukawa, Yuichi; Ota, Masayuki; Hara, Kaoru; Kin, Tadahiro*; Meng, J.*

High-spin states in $$^{173}$$W have been studied using the $$^{150}$$Nd($$^{28}$$Si,5$$n$$)$$^{173}$$W reaction at beam energies of 135 and 140 MeV. The previously known bands associated with the 7/2$$^+$$[633], 5/2$$^-$$[512], and 1/2$$^-$$[521] configurations are extended significantly, and the unfavored signature branch of the 1/2$$^-$$[521] band is established for the first time. The band properties, such as level spacings, band-crossing frequencies, alignment gains, and signature splittings, are discussed with an emphasis on the low-spin signature inversion observed in the 5/2$$^-$$[512] band. By comparing the experimental $$B$$($$M$$1)/$$B$$($$E$$2) ratios with the theoretical values, we conclude that the configuration of the 5/2$$^-$$[512] band is quite pure at low spins without appreciable admixture of the 5/2$$^-$$[523] orbit, in conflict with the particle rotor model calculated results.

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Category:Physics, Nuclear

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