Competing particle-hole excitations in 30Na: Constraining state-of-the-art effective interactions

被引：11

作者：

Petri, M. ^{[1
]}

Fallon, R. ^{[2
]}

Macchiavelli, A. O. ^{[2
]}

Heil, S. ^{[1
]}

Rodriguez-Vieitez, E. ^{[2
,3
]}

Bazin, D. ^{[4
]}

Campbell, C. M. ^{[4
,5
]}

Clark, R. M. ^{[2
]}

Cromaz, M. ^{[2
]}

Gade, A. ^{[4
,5
]}

Glasmacher, T. ^{[4
,5
]}

Lee, I. Y. ^{[2
]}

Malbrunot-Ettenauer, S. ^{[4
,5
]}

Paschalis, S. ^{[1
]}

Ratkiewicz, A. ^{[4
,5
]}

Terry, J. R. ^{[4
,5
]}

Weisshaar, D. ^{[4
]}

Wiedeking, M. ^{[2
]}

机构：

[1] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

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

[3] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA

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

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

来源：

PHYSICS LETTERS B | 2015年 / 748卷

基金：

美国国家科学基金会;

关键词：

Island of Inversion; Knockout reactions; Radioactive ion beams; Effective interaction; Particle-hole excitations; Negative parity; INTRUDER GROUND-STATE; SPECTROSCOPY; TRANSITION; INVERSION; EVOLUTION; ISLAND; ONSET;

D O I：

10.1016/j.physletb.2015.06.067

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The odd-odd nucleus Na-30 is studied via a one-proton, one-proton-one-neutron and one-neutron removal reaction using an intermediate-energy Mg-31, Mg-32 and Na-31 radioactive ion beam, respectively. Combining high-resolution gamma-ray spectroscopy with the selectivity of the three reaction mechanisms, we are able to distinguish multiple particle-hole configurations. Negative-parity states in Na-30 are observed for the first time, providing an important measure of the excitation of the 1p1h/3p3h configuration and hence the sd-pf shell gap. The extracted band structures and level energies serve as invaluable input for the theoretical refinement of the effective interactions used in this region. (C) 2015 The Authors. Published by Elsevier B.V.

引用

页码：173 / 177

页数：5

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