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

Sumikama, T, Yoshinaga, K, Watanabe, H, Nishimura, S, Miyashita, Y, Yamaguchi, K, Sugimoto, K, Chiba, J, Li, Z, Baba, H , Berryman, JS, Blasi, N, Bracco, A, Camera, F, Doornenbal, P, Go, S, Hashimoto, T, Hayakawa, S, Hinke, C, Ideguchi, E, Isobe, T, Ito, Y, Jenkins, DG, Kawada, Y, Kobayashi, N, Kondo, Y, Krücken, R, Kubono, S, Lorusso, G, Nakano, T, Kurata-Nishimura, M, Odahara, A, Ong, HJ, Ota, S, Podolyák, Z, Sakurai, H, Scheit, H, Steiger, K, Steppenbeck, D, Takano, S, Takashima, A, Tajiri, K, Teranishi, T, Wakabayashi, Y, Walker, PM, Wieland, O and Yamaguchi, H (2012) Search for spin-orbit-force reduction at 106,108Zr around r-process path AIP Conference Proceedings, 1484. pp. 156-160.

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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. © 2012 American Institute of Physics.

Item Type: Article
Authors :
NameEmailORCID
Sumikama, T
Yoshinaga, K
Watanabe, H
Nishimura, S
Miyashita, Y
Yamaguchi, K
Sugimoto, K
Chiba, J
Li, Z
Baba, H
Berryman, JS
Blasi, N
Bracco, A
Camera, F
Doornenbal, P
Go, S
Hashimoto, T
Hayakawa, S
Hinke, C
Ideguchi, E
Isobe, T
Ito, Y
Jenkins, DG
Kawada, Y
Kobayashi, N
Kondo, Y
Krücken, R
Kubono, S
Lorusso, G
Nakano, T
Kurata-Nishimura, M
Odahara, A
Ong, HJ
Ota, S
Podolyák, Z
Sakurai, H
Scheit, H
Steiger, K
Steppenbeck, D
Takano, S
Takashima, A
Tajiri, K
Teranishi, T
Wakabayashi, Y
Walker, PMp.walker@surrey.ac.uk
Wieland, O
Yamaguchi, H
Date : 1 December 2012
Identification Number : 10.1063/1.4763389
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:46
Last Modified : 17 May 2017 15:05
URI: http://epubs.surrey.ac.uk/id/eprint/836659

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