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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationOrigin of Matter and Evolution of Galaxies 2011
Pages156-160
Number of pages5
DOIs
Publication statusPublished - 2012 Dec 1
EventInternational Symposium on Origin of Matter and Evolutions of Galaxies 2011, OMEG 2011 - Wako, Japan
Duration: 2011 Nov 142011 Nov 17

Publication series

NameAIP Conference Proceedings
Volume1484
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

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

Keywords

  • Decay spectroscopy of neutron-rich Zr isotopes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Sumikama, T., Yoshinaga, K., Watanabe, H., Nishimura, S., Miyashita, Y., Yamaguchi, K., Sugimoto, K., Chiba, J., Li, Z., Baba, H., Berryman, J. S., Blasi, N., Bracco, A., Camera, F., Doornenbal, P., Go, S., Hashimoto, T., Hayakawa, S., Hinke, C., ... Yamaguchi, H. (2012). Search for spin-orbit-force reduction at 106,108Zr around r-process path. In Origin of Matter and Evolution of Galaxies 2011 (pp. 156-160). (AIP Conference Proceedings; Vol. 1484). https://doi.org/10.1063/1.4763389