2019 Impact factor 2.176
Hadrons and Nuclei
Eur. Phys. J. A 9, 153-156

Short note

Yrast bands in N=91 isotones

T. Hayakawa1 - M. Oshima1 - Y. Hatsukawa1 - J. Katakura1 - H. Iimura1 - M. Matsuda1 - N. Shinohara1 - Y. Toh1 -
S. Mitarai2 - T. Shizuma3 - M. Sugawara4 - H. Kusakari5

1 Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan
2 Kyushu University, Hakozaki, Fukuoka 812-8581, Japan
3 University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
4 Chiba Institute of Technology, Narashino, Chiba 275-0023, Japan
5 Chiba University, Inage-ku, Chiba 263-8522, Japan
hayakawa@jball4.tokai.jaeri.go.jp

Received: 28 June 2000 / Revised version: 13 October 2000
Communicated by D. Schwalm

Abstract
The in-beam spectroscopy on N=91 isotones has been carried out using the 12C + 150Nd reaction. The ${\nu}i_{13/2}$ and ${\nu}h_{11/2}$ bands of 153Sm have been extended up to 33/2+ and 31/2-, respectively. Two new $\gamma$-rays have been located on the top of the unfavored band with ${\nu}i_{13/2}$ configuration in 157Dy. Two identical relationships have been established in the low-spin region of the yrast $\nu$i13/2 configuration between 153Sm and 155Gd, and between unfavored bands of 155Gd and 157Dy. Here all these nuclei have the same neutron number N=91.

PACS
23.20.Lv Gamma transition and level energy - 27.70.+q $150 \leq A \leq 189$


Copyright Società Italiana di Fisica, Springer-Verlag 2000