Identification of deformed intruder states in semi-magic 70Ni

被引：39

作者：

Chiara, C. J. ^{[1
,2
]}

Weisshaar, D. ^{[3
]}

Janssens, R. V. F. ^{[2
]}

Tsunoda, Y. ^{[4
]}

Otsuka, T. ^{[3
,4
,5
]}

Harker, J. L. ^{[1
,2
]}

Walters, W. B. ^{[1
]}

Recchia, F. ^{[3
,6
]}

Albers, M. ^{[2
]}

Alcorta, M. ^{[2
]}

Bader, V. M. ^{[3
,7
]}

Baugher, T. ^{[3
,7
]}

Bazin, D. ^{[3
,7
]}

Berryman, J. S. ^{[3
]}

Bertone, P. F. ^{[2
]}

Campbell, C. M. ^{[8
]}

Carpenter, M. P. ^{[2
]}

Chen, J. ^{[9
]}

Crawford, H. L. ^{[8
]}

David, H. M. ^{[2
,10
]}

Doherty, D. T. ^{[2
]}

Gade, A. ^{[3
,7
]}

Hoffman, C. R. ^{[2
]}

Honma, M. ^{[11
]}

Kondev, F. G. ^{[9
]}

Korichi, A. ^{[2
,12
]}

Langer, C. ^{[3
,13
]}

Larson, N. ^{[3
,14
]}

Lauritsen, T. ^{[2
]}

Liddick, S. N. ^{[3
,14
]}

Lunderberg, E. ^{[3
,7
]}

Macchiavelli, A. O. ^{[8
]}

Noji, S. ^{[3
]}

Prokop, C. ^{[3
,14
]}

Rogers, A. M. ^{[2
]}

Seweryniak, D. ^{[2
]}

Shimizu, N. ^{[5
]}

Stroberg, S. R. ^{[3
,7
]}

Suchyta, S. ^{[3
,14
]}

Utsuno, Y. ^{[15
]}

Williams, S. J. ^{[3
]}

Wimmer, K. ^{[3
,16
]}

Zhu, S. ^{[2
]}

机构：

[1] Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA

[2] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

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

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

[5] Univ Tokyo, Ctr Nucl Study, Bunkyo Ku, Tokyo 1130033, Japan

[6] Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy

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

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

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

[10] Univ Edinburgh, Sch Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland

[11] Univ Aizu, Ctr Math Sci, Aizu Wakamatsu, Fukushima 9658580, Japan

[12] CNRS, IN2P3, CSNSM, F-91405 Orsay, France

[13] Michigan State Univ, Joint Inst Nucl Astrophys, E Lansing, MI 48824 USA

[14] Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA

[15] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

[16] Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA

来源：

PHYSICAL REVIEW C | 2015年 / 91卷 / 04期

基金：

美国国家科学基金会;

关键词：

NEUTRON-RICH NUCLEI; MU-S-ISOMERS; SUBSHELL CLOSURE; SHELL-MODEL; NI-68;

D O I：

10.1103/PhysRevC.91.044309

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The structure of semi-magic Ni-70(28)42 was investigated following complementary multinucleon-transfer and secondary fragmentation reactions. Changes to the higher-spin, presumed negative-parity states based on observed gamma-ray coincidence relationships result in better agreement with shell-model calculations using effective interactions in the neutron f(5/2)pg(9/2) model space. The second 2(+) and (4(+)) states, however, can only be successfully described when proton excitations across the Z = 28 shell gap are included. Monte Carlo shell-model calculations suggest that the latter two states are part of a prolate-deformed intruder sequence, establishing an instance of shape coexistence at low excitation energies similar to that observed recently in neighboring Ni-68.

引用

页数：10

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