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Warm Nuclei: Nuclear Structure Effects on the Order-to-Chaos Transition Region

Abstract : The \gamma -decay from the warm rotation in the transition region between order and chaos is studied in the superdeformed (SD) nuclei 151Tb and 196Pb, using the EUROBALL IV array. A number of observables, testing the decay dynamics in the SD well, are compared with predictions from a Monte Carlo simulation of the \gamma -decay based on microscopic calculations of discrete levels and decay probabilities. Agreement with the data is found only assuming an enhancement of the B(E1) strength around 1 MeV by a factor of 10-100, which is consistent with the evidence for octupole vibrations in both mass regions. The work shows the relevance of \gamma -spectroscopy in the order-to-chaos regime to highlight specific nuclear structure effects.
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http://hal.in2p3.fr/in2p3-00373501
Contributor : Yvette Heyd <>
Submitted on : Monday, April 6, 2009 - 11:27:26 AM
Last modification on : Saturday, June 20, 2020 - 4:40:03 PM

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  • HAL Id : in2p3-00373501, version 1

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S. Leoni, G. Benzoni, N. Blasi, A. Bracco, S. Brambilla, et al.. Warm Nuclei: Nuclear Structure Effects on the Order-to-Chaos Transition Region. Zakopane Conference on Nuclear Physics, Sep 2008, Zakopane, Poland. pp.555. ⟨in2p3-00373501⟩

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