Rotational band properties of 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 W have been studied using the Nd(Si,5)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 (1)/(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.