Phys. Rev. Lett. 86, 2746–2749 (2001)Linear Polarization Measurement of Interband Transitions in Superdeformed 190Hg: Model-Independent Evidence for Octupole Vibrational StructuresReceived 2 August 2000; published in the issue dated 26 March 2001 The linear polarization of γ rays between excited and yrast superdeformed (SD) states in 190Hg was measured using the four-element CLOVER detectors of the EUROBALL IV γ-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 electric 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∼190 region in terms of octupole excitations. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.2746
DOI:
10.1103/PhysRevLett.86.2746
PACS:
21.10.Re, 23.20.En, 27.80.+w
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