Rotational alignment of the band inT. Hayakawa1, Y. Toh1, M. Oshima1, M. Matsuda1, Y. Hatsukawa1, J. Katakura1, H. Iimura1, T. Shizuma1, S. Mitarai2, M. Sugawara3, H. Kusakari4 and Y.H. Zhang5
1 Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan
2 Kyushu University, Hakozaki, Fukuoka 812-8581, Japan
3 Chiba Institute of Technology, Narashino, Chiba 275-8588, Japan
4 Chiba University, Inage-ku, Chiba 263-8522, Japan
5 Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000, PRC
(Received: 22 August 2002 / Revised version: 24 September 2002 / Published online: 19 November 2002)
High-spin states of 157Dy were investigated using in-beam -ray spectroscopy techniques with a 150Nd( 12C, 5n) reaction. Three rotational bands with the h9/2, i13/2 and h11/2 configurations were observed up to (43/2 -), 53/2 + and 45/2 -, respectively. Interband M1 transitions in the h11/2 (high- ) band were also measured up to the highest-spin state. The high-spin states were well reproduced by calculations using the tilted-axis-cranking model (TAC). The B(M1)/B(E2) ratio, Routhian and the tilted angle of the angular-momentum vector are found to be in good agreement with the result of the TAC calculation.
23.20.Lv - Gamma transitions and level energies .
27.70.+q - .
21.60.Ev - Collective models.
© Società Italiana di Fisica, Springer-Verlag 2002