Coulomb excitation of 174Hf K-isomer. γ-ray spectroscopy with high-spin isomer beam

T. Morikawa, Y. Gono, K. Morita, T. Kishida, T. Murakami, E. Ideguchi, H. Kumagai, G. H. Liu, A. Ferragut, A. Yoshida, Y. H. Zhang, M. Oshima, M. Sugawara, H. Kusakari, M. Ogawa, M. Nakajima, H. Tsuchida, S. Mitarai, A. Odahara, M. KideraM. Shibata, J. C. Kim, S. J. Chae, Y. Hatsukawa, M. Ishihara

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A new experimental technique utilizing a high-spin isomer beam (HSIB) has been developed. The HSIB of 174Hf was produced by the 9Be(170Er, 5n)174Hf reaction in inverse kinematics. By using the HSIB, the Coulomb excitation of the Kπ = 8- isomer in 174Hf was measured. The γ-rays from the 9- level, which is the first excited state built on the isomer, were observed as well as the cascade γ-rays of the ground-state rotational band. From the measured γ-ray yield, a value of 2 ± 1 e2b2 was extracted for the B(E2: 8- → 9-). This is the first experiment of γ-ray spectroscopy by means of the HSIB-induced secondary reactions.

Original languageEnglish
Pages (from-to)169-172
Number of pages4
JournalPhysics Letters B
Issue number2
Publication statusPublished - May 11 1995
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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