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

S. Nishimura; Z. Li; H. Watanabe; K. Yoshinaga; T. Sumikama; T. Tachibana; K. Yamaguchi; M. Kurata-Nishimura; G. Lorusso; Y. Miyashita; A. Odahara; H. Baba; J. S. Berryman; N. Blasi; A. Bracco; F. Camera; J. Chiba; P. Doornenbal; Shintaro Go; T. Hashimoto; S. Hayakawa; C. Hinke; E. Ideguchi; T. Isobe; Y. Ito; D. G. Jenkins; Y. Kawada; N. Kobayashi; Y. Kondo; R. Krücken; S. Kubono; T. Nakano; H. J. Ong; S. Ota; Zs Podolyák; H. Sakurai; H. Scheit; K. Steiger; D. Steppenbeck; K. Sugimoto; S. Takano; A. Takashima; K. Tajiri; T. Teranishi; Y. Wakabayashi; P. M. Walker; O. Wieland; H. Yamaguchi

doi:10.1103/PhysRevLett.106.052502

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

S. Nishimura, Z. Li, H. Watanabe, K. Yoshinaga, T. Sumikama, T. Tachibana, K. Yamaguchi, M. Kurata-Nishimura, G. Lorusso, Y. Miyashita, A. Odahara, H. Baba, J. S. Berryman, N. Blasi, A. Bracco, F. Camera, J. Chiba, P. Doornenbal, Shintaro Go, T. HashimotoS. Hayakawa, C. Hinke, E. Ideguchi, T. Isobe, Y. Ito, D. G. Jenkins, Y. Kawada, N. Kobayashi, Y. Kondo, R. Krücken, S. Kubono, T. Nakano, H. J. Ong, S. Ota, Zs Podolyák, H. Sakurai, H. Scheit, K. Steiger, D. Steppenbeck, K. Sugimoto, S. Takano, A. Takashima, K. Tajiri, T. Teranishi, Y. Wakabayashi, P. M. Walker, O. Wieland, H. Yamaguchi

Experimental Particle Physics

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118 Citations (Scopus)

Abstract

The β-decay half-lives of 38 neutron-rich isotopes from Kr36 to Tc43 have been measured; the half-lives of Kr100, Sr103-105, Y106-108, Zr108-110, Nb111,112, Mo112-115, and Tc116,117 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≈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.

Original language	English
Article number	052502
Journal	Physical review letters
Volume	106
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevLett.106.052502
Publication status	Published - Feb 3 2011

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1103/PhysRevLett.106.052502

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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, J. S., Blasi, N., Bracco, A., Camera, F., Chiba, J., Doornenbal, P., Go, S., ... 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]. https://doi.org/10.1103/PhysRevLett.106.052502

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 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, vol. 106, no. 5, 052502. https://doi.org/10.1103/PhysRevLett.106.052502

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title = "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",

abstract = "The β-decay half-lives of 38 neutron-rich isotopes from Kr36 to Tc43 have been measured; the half-lives of Kr100, Sr103-105, Y106-108, Zr108-110, Nb111,112, Mo112-115, and Tc116,117 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≈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.",

author = "S. Nishimura and Z. Li and H. Watanabe and K. Yoshinaga and T. Sumikama and T. Tachibana and K. Yamaguchi and M. Kurata-Nishimura and G. Lorusso and Y. Miyashita and A. Odahara and H. Baba and Berryman, {J. S.} and N. Blasi and A. Bracco and F. Camera and J. Chiba and P. Doornenbal and Shintaro Go and T. Hashimoto and S. Hayakawa and C. Hinke and E. Ideguchi and T. Isobe and Y. Ito and Jenkins, {D. G.} and Y. Kawada and N. Kobayashi and Y. Kondo and R. Kr{\"u}cken and S. Kubono and T. Nakano and Ong, {H. J.} and S. Ota and Zs Podoly{\'a}k and H. Sakurai and H. Scheit and K. Steiger and D. Steppenbeck and K. Sugimoto and S. Takano and A. Takashima and K. Tajiri and T. Teranishi and Y. Wakabayashi and Walker, {P. M.} and O. Wieland and H. Yamaguchi",

year = "2011",

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doi = "10.1103/PhysRevLett.106.052502",

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T1 - β-Decay half-lives of very neutron-rich Kr to Tc isotopes on the boundary of the r-process path

T2 - An indication of fast r-matter flow

AU - Nishimura, S.

AU - Li, Z.

AU - Watanabe, H.

AU - Yoshinaga, K.

AU - Sumikama, T.

AU - Tachibana, T.

AU - Yamaguchi, K.

AU - Kurata-Nishimura, M.

AU - Lorusso, G.

AU - Miyashita, Y.

AU - Odahara, A.

AU - Baba, H.

AU - Berryman, J. S.

AU - Blasi, N.

AU - Bracco, A.

AU - Camera, F.

AU - Chiba, J.

AU - Doornenbal, P.

AU - Go, Shintaro

AU - Hashimoto, T.

AU - Hayakawa, S.

AU - Hinke, C.

AU - Ideguchi, E.

AU - Isobe, T.

AU - Ito, Y.

AU - Jenkins, D. G.

AU - Kawada, Y.

AU - Kobayashi, N.

AU - Kondo, Y.

AU - Krücken, R.

AU - Kubono, S.

AU - Nakano, T.

AU - Ong, H. J.

AU - Ota, S.

AU - Podolyák, Zs

AU - Sakurai, H.

AU - Scheit, H.

AU - Steiger, K.

AU - Steppenbeck, D.

AU - Sugimoto, K.

AU - Takano, S.

AU - Takashima, A.

AU - Tajiri, K.

AU - Teranishi, T.

AU - Wakabayashi, Y.

AU - Walker, P. M.

AU - Wieland, O.

AU - Yamaguchi, H.

PY - 2011/2/3

Y1 - 2011/2/3

N2 - The β-decay half-lives of 38 neutron-rich isotopes from Kr36 to Tc43 have been measured; the half-lives of Kr100, Sr103-105, Y106-108, Zr108-110, Nb111,112, Mo112-115, and Tc116,117 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≈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.

AB - The β-decay half-lives of 38 neutron-rich isotopes from Kr36 to Tc43 have been measured; the half-lives of Kr100, Sr103-105, Y106-108, Zr108-110, Nb111,112, Mo112-115, and Tc116,117 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≈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.

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DO - 10.1103/PhysRevLett.106.052502

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SN - 0031-9007

VL - 106

JO - Physical Review Letters

JF - Physical Review Letters

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M1 - 052502

ER -

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

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