Isospin Symmetry at High Spin Studied via Nucleon Knockout from Isomeric States

被引：15

作者：

Milne, S. A. ^{[1
]}

Bentley, M. A. ^{[1
]}

Simpson, E. C. ^{[2
]}

Baugher, T. ^{[3
,4
]}

Bazin, D. ^{[4
]}

Berryman, J. S. ^{[4
]}

Bruce, A. M. ^{[5
]}

Davies, P. J. ^{[1
]}

Diget, C. Aa. ^{[1
]}

Gade, A. ^{[3
,4
]}

Henry, T. W. ^{[1
]}

Iwasaki, H. ^{[3
,4
]}

Lemasson, A. ^{[4
,6
]}

Lenzi, S. M. ^{[7
,8
]}

McDaniel, S. ^{[3
,4
]}

Napoli, D. R. ^{[9
]}

Nichols, A. J. ^{[1
]}

Ratkiewicz, A. ^{[3
,4
]}

Scruton, L. ^{[1
]}

Stroberg, S. R. ^{[3
,4
,10
]}

Tostevin, J. A. ^{[11
]}

Weisshaar, D. ^{[4
]}

Wimmer, K. ^{[4
,12
]}

Winkler, R. ^{[4
]}

机构：

[1] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

[2] Australian Natl Univ, Res Sch Phys & Engn, Dept Nucl Phys, Canberra, ACT 2601, Australia

[3] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

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

[5] Univ Brighton, Sch Comp Engn & Math, Brighton BN2 4GJ, E Sussex, England

[6] CEA DSM CNRS IN2P3, GANIL, BP55027, F-14076 Caen 5, France

[7] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy

[8] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy

[9] Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy

[10] TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada

[11] Univ Surrey, Fac Engn & Phys Sci, Dept Phys, Guildford GU2 7XH, Surrey, England

[12] Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 117卷 / 08期

基金：

英国科学技术设施理事会; 美国国家科学基金会;

关键词：

EXOTIC NUCLEI; SHELL-MODEL; BEAMS; SPECTROSCOPY; FRAGMENTATION; SEPARATOR; DECAY;

D O I：

10.1103/PhysRevLett.117.082502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

One-neutron knockout reactions have been performed on a beam of radioactive Co-53 in a high-spin isomeric state. The analysis is shown to yield a highly selective population of high-spin states in an exotic nucleus with a significant cross section, and hence represents a technique that is applicable to the planned new generation of fragmentation-based radioactive beam facilities. Additionally, the relative cross sections among the excited states can be predicted to a high level of accuracy when reliable shell-model input is available. The work has resulted in a new level scheme, up to the 11(+) band-termination state, of the proton-rich nucleus Co-52 (Z = 27, N = 25). This has in turn enabled a study of mirror energy differences in the A = 52 odd-odd mirror nuclei, interpreted in terms of isospin-nonconserving (INC) forces in nuclei. The analysis demonstrates the importance of using a full set of J-dependent INC terms to explain the experimental observations.

引用

页数：5

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