Mapping of a new deformation region around Ti 62

S. Michimasa, M. Kobayashi, Y. Kiyokawa, S. Ota, R. Yokoyama, D. Nishimura, D. S. Ahn, H. Baba, G. P.A. Berg, M. Dozono, N. Fukuda, T. Furuno, E. Ideguchi, N. Inabe, T. Kawabata, S. Kawase, K. Kisamori, K. Kobayashi, T. Kubo, Y. KubotaC. S. Lee, M. Matsushita, H. Miya, A. Mizukami, H. Nagakura, H. Oikawa, H. Sakai, Y. Shimizu, A. Stolz, H. Suzuki, M. Takaki, H. Takeda, S. Takeuchi, H. Tokieda, T. Uesaka, K. Yako, Y. Yamaguchi, Y. Yanagisawa, K. Yoshida, S. Shimoura

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We performed the first direct mass measurements of neutron-rich scandium, titanium, and vanadium isotopes around the neutron number 40 at the RIKEN RI Beam Factory using the time-of-flight magnetic-rigidity technique. The atomic mass excesses of Sc58-60, Ti60-62, and V62-64 were measured for the first time. The experimental results show that the two-neutron separation energies in the vicinity of Ti62 increase compared to neighboring nuclei. This shows that the masses of Ti isotopes near N=40 are affected by the Jahn-Teller effect. Therefore, a development of Jahn-Teller stabilization appears below the Cr isotopes, and the systematics in Sc, Ti, and V isotopes suggest that Ti62 is located close to the peak of the Jahn-Teller effect.

Original languageEnglish
Article number122501
JournalPhysical review letters
Volume125
Issue number12
DOIs
Publication statusPublished - Sep 2020

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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