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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), 052502. - - -.

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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 :
AuthorsEmailORCID
Nishimura, SUNSPECIFIEDUNSPECIFIED
Li, ZUNSPECIFIEDUNSPECIFIED
Watanabe, HUNSPECIFIEDUNSPECIFIED
Yoshinaga, KUNSPECIFIEDUNSPECIFIED
Sumikama, TUNSPECIFIEDUNSPECIFIED
Tachibana, TUNSPECIFIEDUNSPECIFIED
Yamaguchi, KUNSPECIFIEDUNSPECIFIED
Kurata-Nishimura, MUNSPECIFIEDUNSPECIFIED
Lorusso, GUNSPECIFIEDUNSPECIFIED
Miyashita, YUNSPECIFIEDUNSPECIFIED
Odahara, AUNSPECIFIEDUNSPECIFIED
Baba, HUNSPECIFIEDUNSPECIFIED
Berryman, JSUNSPECIFIEDUNSPECIFIED
Blasi, NUNSPECIFIEDUNSPECIFIED
Bracco, AUNSPECIFIEDUNSPECIFIED
Camera, FUNSPECIFIEDUNSPECIFIED
Chiba, JUNSPECIFIEDUNSPECIFIED
Doornenbal, PUNSPECIFIEDUNSPECIFIED
Go, SUNSPECIFIEDUNSPECIFIED
Hashimoto, TUNSPECIFIEDUNSPECIFIED
Hayakawa, SUNSPECIFIEDUNSPECIFIED
Hinke, CUNSPECIFIEDUNSPECIFIED
Ideguchi, EUNSPECIFIEDUNSPECIFIED
Isobe, TUNSPECIFIEDUNSPECIFIED
Ito, YUNSPECIFIEDUNSPECIFIED
Jenkins, DGUNSPECIFIEDUNSPECIFIED
Kawada, YUNSPECIFIEDUNSPECIFIED
Kobayashi, NUNSPECIFIEDUNSPECIFIED
Kondo, YUNSPECIFIEDUNSPECIFIED
Krücken, RUNSPECIFIEDUNSPECIFIED
Kubono, SUNSPECIFIEDUNSPECIFIED
Nakano, TUNSPECIFIEDUNSPECIFIED
Ong, HJUNSPECIFIEDUNSPECIFIED
Ota, SUNSPECIFIEDUNSPECIFIED
Podolyák, ZUNSPECIFIEDUNSPECIFIED
Sakurai, HUNSPECIFIEDUNSPECIFIED
Scheit, HUNSPECIFIEDUNSPECIFIED
Steiger, KUNSPECIFIEDUNSPECIFIED
Steppenbeck, DUNSPECIFIEDUNSPECIFIED
Sugimoto, KUNSPECIFIEDUNSPECIFIED
Takano, SUNSPECIFIEDUNSPECIFIED
Takashima, AUNSPECIFIEDUNSPECIFIED
Tajiri, KUNSPECIFIEDUNSPECIFIED
Teranishi, TUNSPECIFIEDUNSPECIFIED
Wakabayashi, YUNSPECIFIEDUNSPECIFIED
Walker, PMUNSPECIFIEDUNSPECIFIED
Wieland, OUNSPECIFIEDUNSPECIFIED
Yamaguchi, HUNSPECIFIEDUNSPECIFIED
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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