Linear polarization measurement of interband transitions in superdeformed Hg-190: Model-independent evidence for octupole vibrational structures

Citation
A. Korichi et al., Linear polarization measurement of interband transitions in superdeformed Hg-190: Model-independent evidence for octupole vibrational structures, PHYS REV L, 86(13), 2001, pp. 2746-2749
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
86
Issue
13
Year of publication
2001
Pages
2746 - 2749
Database
ISI
SICI code
0031-9007(20010326)86:13<2746:LPMOIT>2.0.ZU;2-U
Abstract
The linear polarization of gamma rays between excited and yrast superdeform ed (SD) states in Hg-190 was measured using the four-element CLOVER detecto rs of the EUROBALL IV gamma -ray spectrometer. This measurement shows in a model-independent way that the interband transitions which compete with the highly collective in-band quadrupole transitions are largely enhanced elec tric dipoles. Not only do these results represent the first measurement of the multipolarity of transitions between different SD states, but they also provide strong evidence for the interpretation of the structures in the SD minimum of the A similar to 190 region in terms of octupole excitations.