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

Authors
Plettner, C Ragnarsson, I Schnare, H Schwengner, R Kaubler, L Donau, F Algora, A de Angelis, G Napoli, DR Gadea, A Eberth, J Steinhardt, T Thelen, O Hausmann, M Muller, A Jungclaus, A Lieb, KP Jenkins, DG Wadsworth, R Wilson, AN
Citation
C. Plettner et al., Signature inversion caused by triaxiality and unpaired band crossings in Br-72, PHYS REV L, 85(12), 2000, pp. 2454-2457
Citations number
19
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
85
Issue
12
Year of publication
2000
Pages
2454 - 2457
Database
ISI
SICI code
0031-9007(20000918)85:12<2454:SICBTA>2.0.ZU;2-E
Abstract
High-spin states in Br-72 were studied with the EUROBALL III spectrometer u sing the Ca-40(Ca-40, alpha 3p1n) reaction. The negative-parity band observ ed in this experiment displays a signature inversion around spin I = 16. Th e interpretation within the cranked Nilsson-Strutinsky approach shows that this signature pattern is a signal of a substantial triaxial shape change w ith increasing spin where the nucleus evolves from a triaxial shape with ro tation about the intermediate axis at low spin through a collective prolate shape to a triaxial shape but with rotation about the shortest principal a xis at high spin.