Orbital Dependent Nucleonic Pairing in the Lightest Known Isotopes of Tin

被引：92

作者：

Darby, I. G. ^{[1
,2
]}

Grzywacz, R. K. ^{[1
,3
]}

Batchelder, J. C. ^{[4
]}

Bingham, C. R. ^{[1
,3
]}

Cartegni, L. ^{[1
]}

Gross, C. J. ^{[3
]}

Hjorth-Jensen, M. ^{[5
,6
]}

Joss, D. T. ^{[7
]}

Liddick, S. N. ^{[1
]}

Nazarewicz, W. ^{[1
,3
,8
]}

Padgett, S. ^{[1
]}

Page, R. D. ^{[7
]}

Papenbrock, T. ^{[1
,3
]}

Rajabali, M. M. ^{[1
]}

Rotureau, J. ^{[1
]}

Rykaczewski, K. P. ^{[3
]}

机构：

[1] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[2] Katholieke Univ Leuven, Inst Kern Stralingsfys, B-3001 Louvain, Belgium

[3] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA

[4] Oak Ridge Associated Univ, UNIRIB, Oak Ridge, TN 37831 USA

[5] Univ Oslo, Dept Phys, N-0316 Oslo, Norway

[6] Univ Oslo, Ctr Math Applicat, N-0316 Oslo, Norway

[7] Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England

[8] Univ Warsaw, Inst Theoret Phys, PL-00681 Warsaw, Poland

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 16期

基金：

英国科学技术设施理事会;

关键词：

DECAY;

D O I：

10.1103/PhysRevLett.105.162502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

By studying the Xe-109 -> Te-105 -> Sn-101 superallowed alpha-decay chain, we observe low-lying states in Sn-101, the one-neutron system outside doubly magic Sn-100. We find that the spins of the ground state (J = 7/2) and first excited state (J = 5/2) in Sn-101 are reversed with respect to the traditional level ordering postulated for Sn-103 and the heavier tin isotopes. Through simple arguments and state-of-the-art shell-model calculations we explain this unexpected switch in terms of a transition from the single-particle regime to the collective mode in which orbital-dependent pairing correlations dominate.

引用

页数：4

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