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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 :
NameEmailORCID
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
Yamaguchi, H
Date : 3 February 2011
Identification Number : 10.1103/PhysRevLett.106.052502
Depositing User : Symplectic Elements
Date Deposited : 22 Sep 2011 11:15
Last Modified : 31 Oct 2017 14:08
URI: http://epubs.surrey.ac.uk/id/eprint/7141

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