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

被引：133

作者：

Nishimura, S. ^{[1
]}

Li, Z. ^{[1
]}

Watanabe, H. ^{[1
]}

Yoshinaga, K. ^{[1
,2
]}

Sumikama, T. ^{[2
]}

Tachibana, T. ^{[3
]}

Yamaguchi, K. ^{[4
]}

Kurata-Nishimura, M. ^{[1
]}

Lorusso, G. ^{[1
,5
]}

Miyashita, Y. ^{[2
]}

Odahara, A. ^{[4
]}

Baba, H. ^{[1
]}

Berryman, J. S. ^{[6
]}

Blasi, N. ^{[7
]}

Bracco, A. ^{[7
,8
]}

Camera, F. ^{[7
,8
]}

Chiba, J. ^{[2
]}

Doornenbal, P. ^{[1
]}

Go, S. ^{[9
]}

Hashimoto, T. ^{[9
]}

Hayakawa, S. ^{[9
]}

Hinke, C. ^{[10
]}

Ideguchi, E. ^{[9
]}

Isobe, T. ^{[1
]}

Ito, Y. ^{[4
]}

Jenkins, D. G. ^{[11
]}

Kawada, Y. ^{[12
]}

Kobayashi, N. ^{[12
]}

Kondo, Y. ^{[12
]}

Kruecken, R. ^{[10
]}

Kubono, S. ^{[9
]}

Nakano, T. ^{[2
]}

Ong, H. J. ^{[13
]}

Ota, S. ^{[9
]}

Podolyak, Zs. ^{[14
]}

Sakurai, H. ^{[1
]}

Scheit, H. ^{[1
]}

Steiger, K. ^{[10
]}

Steppenbeck, D. ^{[1
]}

Sugimoto, K. ^{[2
]}

Takano, S. ^{[2
]}

Takashima, A. ^{[4
]}

Tajiri, K. ^{[4
]}

Teranishi, T. ^{[15
]}

Wakabayashi, Y. ^{[16
]}

Walker, P. M. ^{[14
]}

Wieland, O. ^{[7
]}

Yamaguchi, H. ^{[9
]}

机构：

[1] RIKEN, Nishina Ctr, Wako, Saitama 3510198, Japan

[2] Tokyo Univ Sci, Dept Phys, Chiba 2788510, Japan

[3] Waseda Univ, Senior High Sch 4, Nerima Tokyo 1770044, Japan

[4] Osaka Univ, Dept Phys, Osaka 5600043, Japan

[5] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA

[6] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA

[7] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

[8] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[9] Univ Tokyo, Ctr Nucl Study, Wako, Saitama 3510198, Japan

[10] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany

[11] Univ York, Dept Phys, York Y01 5DD, N Yorkshire, England

[12] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan

[13] Osaka Univ, Nucl Phys Res Ctr, Osaka 5670047, Japan

[14] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England

[15] Kyushu Univ, Dept Phys, Fukuoka 8128581, Japan

[16] Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 05期

关键词：

MASS FORMULA;

D O I：

10.1103/PhysRevLett.106.052502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：5

共 19 条

[1] High-accuracy mass measurements of neutron-rich Kr isotopes [J].