Hindered proton collectivity in the proton-rich nucleus 28S: Possible magic number 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: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The reduced transition probability B(E2;0gs+→ 21+) for the proton-rich nucleus 28S was determined experimentally using intermediate-energy Coulomb excitation. The resultant B(E2) value 181(31) e2fm4 is smaller than those of neighboring N = 12 isotones and Z = 16 isotopes. The double ratio |M n/Mp|/(N/Z) of the 0gs+→2 1+ transition in 28S was obtained to be 1.9(2) by evaluating the Mn value from the known B(E2) value of the mirror nucleus 28Mg, showing the hindrance of proton collectivity relative to that of neutrons. These results indicate the emergence of the magic number Z = 16 in 28S.

Original languageEnglish
Title of host publicationNuclear Structure and Dynamics 2012 - Proceedings of the International Conference
Pages71-74
Number of pages4
DOIs
Publication statusPublished - 2012
EventInternational Conference on Nuclear Structure and Dynamics 2012 - Opatija, Croatia
Duration: 2012 Jul 92012 Jul 13

Publication series

NameAIP Conference Proceedings
Volume1491
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceInternational Conference on Nuclear Structure and Dynamics 2012
Country/TerritoryCroatia
CityOpatija
Period12/7/912/7/13

Keywords

  • Coulomb excitation
  • Multipole matrix elements
  • Reaction induced by unstable nuclei

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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