Search for spin-orbit-force reduction at 106,108Zr around r-process path

T. Sumikama, K. Yoshinaga, H. Watanabe, S. Nishimura, Y. Miyashita, K. Yamaguchi, K. Sugimoto, J. Chiba, Z. Li, H. Baba, J. S. Berryman, N. Blasi, A. Bracco, F. Camera, P. Doornenbal, S. Go, T. Hashimoto, S. Hayakawa, C. Hinke, E. IdeguchiT. Isobe, Y. Ito, D. G. Jenkins, Y. Kawada, N. Kobayashi, Y. Kondo, R. Krücken, S. Kubono, G. Lorusso, T. Nakano, M. Kurata-Nishimura, A. Odahara, H. J. Ong, S. Ota, Zs Podolyák, H. Sakurai, H. Scheit, K. Steiger, D. Steppenbeck, S. Takano, A. Takashima, K. Tajiri, T. Teranishi, Y. Wakabayashi, P. M. Walker, O. Wieland, H. Yamaguchi

研究成果: Conference contribution

抄録

Shell gap at the magic number N = 82 is important to reproduce the 2nd peak of r-process abundance. If a spin-orbit force is reduced in a very neutron-rich region, a shell quenching at N = 82 and a new shell closure at N = 70 are predicted. A shell evolution by the spin-orbit-force reduction can be searched for through the shape evolution of Zr isotopes around an expected double magic nuclei, 110Zr(Z=40,N=70). We performed β-γ and isomer spectroscopy at RIBF to observe low-lying states in 106,108Zr. The present results indicate a well deformed shape for 106,108Zr. The drastic reduction of the spin-orbit force most likely does not occur around 110Zr on an r-process path.

本文言語English
ホスト出版物のタイトルOrigin of Matter and Evolution of Galaxies 2011
ページ156-160
ページ数5
DOI
出版ステータスPublished - 2012
外部発表はい
イベントInternational Symposium on Origin of Matter and Evolutions of Galaxies 2011, OMEG 2011 - Wako, Japan
継続期間: 2011 11 142011 11 17

出版物シリーズ

名前AIP Conference Proceedings
1484
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Conference

ConferenceInternational Symposium on Origin of Matter and Evolutions of Galaxies 2011, OMEG 2011
国/地域Japan
CityWako
Period11/11/1411/11/17

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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