Eur. Phys. J. A 15, 299-302 (2002)
DOI: 10.1140/epja/i2002-10082-0

Short Note

Rotational alignment of the band in

T. Hayakawa¹, Y. Toh¹, M. Oshima¹, M. Matsuda¹, Y. Hatsukawa¹, J. Katakura¹, H. Iimura¹, T. Shizuma¹, S. Mitarai², M. Sugawara³, H. Kusakari⁴ and Y.H. Zhang<sup>5

1</sup>  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

hayakawa@jball4.tokai.jaeri.go.jp

(Received: 22 August 2002 / Revised version: 24 September 2002 / Published online: 19 November 2002)

Abstract
High-spin states of ¹⁵⁷Dy were investigated using in-beam -ray spectroscopy techniques with a ¹⁵⁰Nd( ¹²C, 5n) reaction. Three rotational bands with the h_9/2, i_13/2 and h_11/2 configurations were observed up to (43/2 ^-), 53/2 ⁺ and 45/2 ^-, respectively. Interband M1 transitions in the h_11/2 (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.

PACS
23.20.Lv - Gamma transitions and level energies .
27.70.+q - .
21.60.Ev - Collective models.

© Società Italiana di Fisica, Springer-Verlag 2002