Signature inversion caused by triaxiality and unpaired band crossings in 72Br

被引：35
|
作者：
Plettner, C
Ragnarsson, I
Schnare, H
Schwengner, R
Käubler, L
Dönau, F
Algora, A
de Angelis, G
Napoli, DR
Gadea, A
Eberth, J
Steinhardt, T
Thelen, O
Hausmann, M
Müller, A
Jungclaus, A
Lieb, KP
Jenkins, DG
Wadsworth, R
Wilson, AN
机构：
[1] Rossendorf Inc, Forschungszentrum Rossendorf EV, Inst Kern & Hadronenphys, D-01314 Dresden, Germany
[2] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania
[3] Lund Inst Technol, Dept Math Phys, S-22100 Lund, Sweden
[4] Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy
[5] Inst Fis Corpuscular, ES-46071 Valencia, Spain
[6] Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany
[7] Univ Gottingen, Inst Phys 2, D-37073 Gottingen, Germany
[8] Univ York, Dept Phys, York YO1 5DD, N Yorkshire, England
来源：
PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 12期
关键词：
D O I：
10.1103/PhysRevLett.85.2454
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
High-spin states in Br-72 were studied with the EUROBALL III spectrometer using the Ca-40(Ca-40, alpha 3p1n) reaction. The negative-parity band observed in this experiment displays a signature inversion around spin I = 16. The interpretation within the cranked Nilsson-Strutinsky approach shows that this signature pattern is a signal of a substantial triaxial shape change with increasing spin where the nucleus evolves from a triaxial shape with rotation about the intermediate axis at low spin through a collective prolate shape to a triaxial shape but with rotation about the shortest principal axis at high spin.
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页码：2454 / 2457
页数：4
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