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Yrast bands in N = 91 isotones |
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| Authors: | T Hayakawa M Oshima Y Hatsukawa J Katakura H Iimura M Matsuda N Shinohara Y Toh S Mitarai T Shizuma M Sugawara H Kusakari |
| Institution: | (1) Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan, JP;(2) Kyushu University, Hakozaki, Fukuoka 812-8581, Japan, JP;(3) University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan, JP;(4) Chiba Institute of Technology, Narashino, Chiba 275-0023, Japan, JP;(5) Chiba University, Inage-ku, Chiba 263-8522, Japan, JP |
| Abstract: | The in-beam spectroscopy on N = 91 isotones has been carried out using the 12C + 150Nd reaction. The νi 13/2 and νh 11/2 bands of 153Sm have been extended up to 33/2+ and 31/2-, respectively. Two new γ-rays have been located on the top of the unfavored band with νi 13/2 configuration in 157Dy. Two identical relationships have been established in the low-spin region of the yrast νi 13/2 configuration between 153Sm and 155Gd, and between unfavored bands of 155Gd and 157Dy. Here all these nuclei have the same neutron number N = 91. Received: 28 June 2000 / Accepted: 20 October 2000 |
| Keywords: | PACS 23 20 Lv Gamma transition and level energy – 27 70 +q 150 ≤ A≤ 189 |
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