Hindered proton collectivity in S121628: Possible magic number at Z=16

Y. Togano, Y. Yamada, N. Iwasa, K. Yamada, T. Motobayashi, N. Aoi, H. Baba, S. Bishop, X. Cai, P. Doornenbal, D. Fang, T. Furukawa, K. Ieki, T. Kawabata, S. Kanno, N. Kobayashi, Y. Kondo, T. Kuboki, N. Kume, K. KuritaM. Kurokawa, Y. G. Ma, Y. Matsuo, H. Murakami, M. Matsushita, T. Nakamura, K. Okada, S. Ota, Y. Satou, S. Shimoura, R. Shioda, K. N. Tanaka, S. Takeuchi, W. Tian, H. Wang, J. Wang, K. Yoneda

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


The reduced transition probability B(E2;0gs+→21+) for S28 was obtained experimentally using Coulomb excitation at 53MeV/nucleon. The resultant B(E2) value 181(31)e2fm4 is smaller than the expectation based on empirical B(E2) systematics. The double ratio |M n/M p|/(N/Z) of the 0gs+→21+ transition in S28 was determined to be 1.9(2) by evaluating the M n value from the known B(E2) value of the mirror nucleus Mg28, showing the hindrance of proton collectivity relative to that of neutrons. These results indicate the emergence of the magic number Z=16 in the |T z|=2 nucleus S28.

Original languageEnglish
Article number222501
JournalPhysical review letters
Issue number22
Publication statusPublished - 2012 May 29

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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