β-Decay Half-Lives of 110 Neutron-Rich Nuclei across the N=82 Shell Gap: Implications for the Mechanism and Universality of the Astrophysical r Process

被引：172

作者：

Lorusso, G. ^{[1
,2
,3
]}

Nishimura, S. ^{[1
,4
]}

Xu, Z. Y. ^{[1
,5
,6
]}

Jungclaus, A. ^{[7
]}

Shimizu, Y. ^{[1
]}

Simpson, G. S. ^{[8
]}

Soederstroem, P. -A. ^{[1
]}

Watanabe, H. ^{[1
,9
]}

Browne, F. ^{[1
,10
]}

Doornenbal, P. ^{[1
]}

Gey, G. ^{[1
,8
]}

Jung, H. S. ^{[11
]}

Meyer, B. ^{[12
]}

Sumikama, T. ^{[13
]}

Taprogge, J. ^{[1
,7
,14
]}

Vajta, Zs. ^{[1
,15
]}

Wu, J. ^{[1
,16
]}

Baba, H. ^{[1
]}

Benzoni, G. ^{[17
]}

Chae, K. Y. ^{[18
]}

Crespi, F. C. L. ^{[17
,19
]}

Fukuda, N. ^{[1
]}

Gernhaeuser, R. ^{[20
]}

Inabe, N. ^{[1
]}

Isobe, T. ^{[1
]}

Kajino, T. ^{[4
,21
]}

Kameda, D. ^{[1
]}

Kim, G. D. ^{[22
]}

Kim, Y. -K. ^{[22
,23
]}

Kojouharov, I. ^{[24
]}

Kondev, F. G. ^{[25
]}

Kubo, T. ^{[1
]}

Kurz, N. ^{[24
]}

Kwon, Y. K. ^{[22
]}

Lane, G. J. ^{[26
]}

Li, Z. ^{[16
]}

Montaner-Piza, A. ^{[27
]}

Moschner, K. ^{[28
]}

Naqvi, F. ^{[29
]}

Niikura, M. ^{[5
]}

Nishibata, H. ^{[30
]}

Odahara, A. ^{[30
]}

Orlandi, R. ^{[31
]}

Patel, Z. ^{[3
]}

Podolyak, Zs. ^{[3
]}

Sakurai, H. ^{[1
,5
]}

Schaffner, H. ^{[24
]}

Schury, P. ^{[1
]}

Shibagaki, S. ^{[4
,21
]}

Steiger, K. ^{[20
]}

机构：

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

[2] Natl Phys Lab, Teddington TW11 0LW, Middx, England

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

[4] NAOJ, Div Theoret Astron, Mitaka, Tokyo 1818588, Japan

[5] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[6] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

[7] CSIC, Inst Estruct Mat, E-28006 Madrid, Spain

[8] Univ Grenoble 1, CNRS, IN2P3, Inst Natl Polytech Grenoble,LPSC, F-38026 Grenoble, France

[9] Beihang Univ, Sch Phys & Nucl Energy Engn, IRCNPC, Beijing 100191, Peoples R China

[10] Univ Brighton, Sch Comp Engn & Math, Brighton BN2 4JG, E Sussex, England

[11] Chung Ang Univ, Dept Phys, Seoul 156756, South Korea

[12] Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA

[13] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[14] Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain

[15] Hungarian Acad Sci, Inst Nucl Res, H-4001 Debrecen, Hungary

[16] Peking Univ, Dept Phys, Beijing 100871, Peoples R China

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

[18] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea

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

[20] Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany

[21] Univ Tokyo, Dept Astron, Bunkyo Ku, Tokyo 1130033, Japan

[22] Inst for Basic Sci Korea, Rare Isotope Sci Project, Taejon 305811, South Korea

[23] Hanyang Univ, Dept Nucl Engn, Seoul 133791, South Korea

[24] GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany

[25] Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA

[26] Australian Natl Univ, RSPE, Dept Phys Nucl, Canberra, ACT 0200, Australia

[27] Univ Valencia, CSIC, Inst Fis Corpuscular, E-46980 Paterna, Spain

[28] Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany

[29] Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA

[30] Osaka Univ, Dept Phys, Toyonaka, Osaka 5600043, Japan

[31] Univ Leuven, KU Leuven, Inst Kern Stralingsfys, B-3001 Louvain, Belgium

[32] Tokyo Univ Sci, Dept Phys, Noda, Chiba 2788510, Japan

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 19期

基金：

匈牙利科学研究基金会; 新加坡国家研究基金会;

关键词：

METAL-POOR STARS; PROCESS NUCLEOSYNTHESIS; DRIVEN WINDS; EARLY GALAXY; ELEMENTS; SUPERNOVAE; PHYSICS; MERGERS; ORIGIN; STABILITY;

D O I：

10.1103/PhysRevLett.114.192501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The beta-decay half-lives of 110 neutron-rich isotopes of the elements from 37 Rb to 50 Sn were measured at the Radioactive Isotope Beam Factory. The 40 new half-lives follow robust systematics and highlight the persistence of shell effects. The new data have direct implications for r-process calculations and reinforce the notion that the second (A approximate to 130) and the rare-earth-element (A approximate to 160) abundance peaks may result from the freeze-out of an (n, gamma) reversible arrow (gamma, n) equilibrium. In such an equilibrium, the new half-lives are important factors determining the abundance of rare-earth elements, and allow for a more reliable discussion of the r process universality. It is anticipated that universality may not extend to the elements Sn, Sb, I, and Cs, making the detection of these elements in metal-poor stars of the utmost importance to determine the exact conditions of individual r-process events.

引用

页数：7

共 61 条

[1] Dynamical r-process studies within the neutrino-driven wind scenario and its sensitivity to the nuclear physics input
Arcones, A.
Martinez-Pinedo, G.
[J]. PHYSICAL REVIEW C, 2011, 83 (04):
[2] The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries
Arnould, M.
Goriely, S.
Takahashi, K.
[J]. PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2007, 450 (4-6): : 97 - 213
[3] The NUBASE2012 evaluation of nuclear properties
Audi, G.
Kondev, F. G.
Wang, M.
Pfeiffer, B.
Sun, X.
Blachot, J.
MacCormick, M.
[J]. CHINESE PHYSICS C, 2012, 36 (12) : 1157 - 1286
[4] Tensor part of the Skyrme energy density functional. II. Deformation properties of magic and semi-magic nuclei
Bender, M.
Bennaceur, K.
Duguet, T.
Heenen, P. -H.
Lesinski, T.
Meyer, J.
[J]. PHYSICAL REVIEW C, 2009, 80 (06):
[5] THE DOUBLY CLOSED SHELL NUCLEUS SN-132(50)82
BJORNSTAD, T
BORGE, MJG
BLOMQVIST, J
VONDINCKLAGE, RD
EWAN, GT
HOFF, P
JONSON, B
KAWADE, K
KEREK, A
KLEPPER, O
LOVHOIDEN, G
MATTSSON, S
NYMAN, G
RAVN, HL
RUDSTAM, G
SISTEMICH, K
TENGBLAD, O
[J]. NUCLEAR PHYSICS A, 1986, 453 (03) : 463 - 485
[6] Explosive nucleosynthesis of 15N in a massive-star model
Bojazi, Michael J.
Meyer, Bradley S.
[J]. PHYSICAL REVIEW C, 2014, 89 (02):
[7] Beta-decay of Z < 50 nuclei near the N=82 closed neutron shell
Borzov, I. N.
Cuenca-Garcia, J. J.
Langanke, K.
Martinez-Pinedo, G.
Montes, F.
[J]. NUCLEAR PHYSICS A, 2008, 814 : 159 - 173
[8] Some properties of r-process accretion disks and jets
Cameron, AGW
[J]. ASTROPHYSICAL JOURNAL, 2001, 562 (01) : 456 - 469
[9] INFLUENCE OF SHELL-QUENCHING FAR FROM STABILITY ON THE ASTROPHYSICAL R-PROCESS
CHEN, B
DOBACZEWSKI, J
KRATZ, KL
LANGANKE, K
PFEIFFER, B
THIELEMANN, FK
VOGEL, P
[J]. PHYSICS LETTERS B, 1995, 355 (1-2) : 37 - 44
[10] THE R-PROCESS AND NUCLEOCHRONOLOGY
COWAN, JJ
THIELEMANN, FK
TRURAN, JW
[J]. PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1991, 208 (4-5): : 267 - 394

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