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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 β-decay half-lives of 38 neutron-rich isotopes from 36Kr to 43Tc have been measured; the half-lives of 100Kr, 103–105Sr, 106–108Y, 108–110Zr, 111,112Nb, 112–115Mo, and 116,117Tc 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≈110 region. A revised model based on the second generation gross theory of β 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
Authors :
AuthorsEmail
Nishimura, SUNSPECIFIED
Li, ZUNSPECIFIED
Watanabe, HUNSPECIFIED
Yoshinaga, KUNSPECIFIED
Sumikama, TUNSPECIFIED
Tachibana, TUNSPECIFIED
Yamaguchi, KUNSPECIFIED
Kurata-Nishimura, MUNSPECIFIED
Lorusso, GUNSPECIFIED
Miyashita, YUNSPECIFIED
Odahara, AUNSPECIFIED
Baba, HUNSPECIFIED
Berryman, JSUNSPECIFIED
Blasi, NUNSPECIFIED
Bracco, AUNSPECIFIED
Camera, FUNSPECIFIED
Chiba, JUNSPECIFIED
Doornenbal, PUNSPECIFIED
Go, SUNSPECIFIED
Hashimoto, TUNSPECIFIED
Hayakawa, SUNSPECIFIED
Hinke, CUNSPECIFIED
Ideguchi, EUNSPECIFIED
Isobe, TUNSPECIFIED
Ito, YUNSPECIFIED
Jenkins, DGUNSPECIFIED
Kawada, YUNSPECIFIED
Kobayashi, NUNSPECIFIED
Kondo, YUNSPECIFIED
Krücken, RUNSPECIFIED
Kubono, SUNSPECIFIED
Nakano, TUNSPECIFIED
Ong, HJUNSPECIFIED
Ota, SUNSPECIFIED
Podolyák, ZUNSPECIFIED
Sakurai, HUNSPECIFIED
Scheit, HUNSPECIFIED
Steiger, KUNSPECIFIED
Steppenbeck, DUNSPECIFIED
Sugimoto, KUNSPECIFIED
Takano, SUNSPECIFIED
Takashima, AUNSPECIFIED
Tajiri, KUNSPECIFIED
Teranishi, TUNSPECIFIED
Wakabayashi, YUNSPECIFIED
Walker, PMUNSPECIFIED
Wieland, OUNSPECIFIED
Yamaguchi, HUNSPECIFIED
Date : 3 February 2011
Identification Number : 10.1103/PhysRevLett.106.052502
Depositing User : Symplectic Elements
Date Deposited : 22 Sep 2011 11:15
Last Modified : 09 Jun 2014 13:30
URI: http://epubs.surrey.ac.uk/id/eprint/7141

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