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β-Decay half-lives of very neutron-rich Kr to Tc isotopes on the boundary of the r-process path: An indication of fast r-matter flow

Nishimura, S, Li, Z, Watanabe, H, Yoshinaga, K, Sumikama, T, Tachibana, T, Yamaguchi, K, Kurata-Nishimura, M, Lorusso, G, Miyashita, Y, Odahara, A, Baba, H, Berryman, JS, Blasi, N, Bracco, A, Camera, F, Chiba, J, 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, Nakano, T, Ong, HJ, Ota, S, Podolyák, Z, Sakurai, H, Scheit, H, Steiger, K, Steppenbeck, D, Sugimoto, K, Takano, S, Takashima, A, Tajiri, K, Teranishi, T, Wakabayashi, Y, Walker, PM, Wieland, O and Yamaguchi, H (2011) β-Decay half-lives of very neutron-rich Kr to Tc isotopes on the boundary of the r-process path: An indication of fast r-matter flow Physical Review Letters, 106 (5). - - -. ISSN 0031-9007

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Abstract

The beta-decay half-lives of 38 neutron-rich isotopes from Kr-36 to Tc-43 have been measured; the half-lives of Kr-100, Sr103-105, Y106-108, Zr108-110, Nb-111,Nb-112, Mo112-115, and Tc-116,Tc-117 are reported here. The results when compared with previous standard models indicate an overestimation in the predicted half-lives by a factor of 2 or more in the A approximate to 110 region. A revised model based on the second generation gross theory of beta decay better predicts the measured half-lives and suggests a more rapid flow of the rapid neutron-capture process (r-matter flow) through this region than previously predicted.

Item Type: Article
Divisions: Faculty of Engineering and Physical Sciences > Physics
Depositing User: Symplectic Elements
Date Deposited: 22 Sep 2011 11:15
Last Modified: 23 Sep 2013 18:44
URI: http://epubs.surrey.ac.uk/id/eprint/7141

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