Eur. Phys. J. A 12, 253-255 (2001)

Short Note

In-beam study of

X.H. Zhou¹, Y. Zheng¹, Y.H. Zhang¹, Z. Liu¹, Q.Y. Pan¹, Z.G. Gan¹, T. Hayakawa², M. Oshima², T. Toh², T. Shizuma², J. Katakura², Y. Hatsukawa², M. Matsuda², H. Kusakari³, M. Sugawara⁴, K. Furuno⁵ and T. Komatsubara<sup>5

1</sup>  Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, PRC
²  Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan
³  Chiba University, Inage-ku, Chiba 263-8512, Japan
⁴  Chiba Institute of Technology, Narashino, Chiba 275-0023, Japan
⁵  Institute of Physics and Tandem Accelerator Center, University of Tsukuba, Japan

ysg@ns.lzb.ac.cn

(Received: 21 September 2001 Communicated by D. Schwalm)

Abstract
The high-spin states of ¹⁴⁵Tb have been studied in the ¹¹⁸Sn( ³² S, 1p4n) reaction at ³²S energies from 161 to 175 MeV using techniques of in-beam -ray spectroscopy. Measurements of -ray excitation functions and - - t coincidences were performed with 12 BGO(AC)HPGe detectors. Based on the measured results of - coincidences, -ray anisotropies and DCO ratios, a level scheme for ¹⁴⁵Tb was established for the first time. The observed excited states show typical irregular pattern in a spherical nucleus, and the low-lying levels have been interpreted qualitatively with a particle-core coupling.

PACS
23.20.Lv - Gamma transitions and level energies.
27.60.+j - .

© Società Italiana di Fisica, Springer-Verlag 2001