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Probing the Order-to-Chaos Region in Superdeformed $^{151}$Tb and $^{196}$Pb Nuclei with Continuum $\gamma$ Transitions

Abstract : The $\gamma$ decay associated with the warm rotation of the superdeformed nuclei 151Tb and 196Pb has been measured with the EUROBALL IV array. Several independent quantities provide a stringent test of the population and decay dynamics in the superdeformed well. A Monte Carlo simulation of the $\gamma$ decay based on microscopic calculations gives remarkable agreement with the data only assuming a large enhancement of the B(E1) strength for 1–2 MeV $\gamma$ rays, which may be related to the evidence for octupole vibrations in both mass regions.
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http://hal.in2p3.fr/in2p3-00332285
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Submitted on : Monday, October 20, 2008 - 3:35:46 PM
Last modification on : Saturday, June 20, 2020 - 4:40:03 PM

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S. Leoni, G. Benzoni, N. Blasi, A. Bracco, S. Brambilla, et al.. Probing the Order-to-Chaos Region in Superdeformed $^{151}$Tb and $^{196}$Pb Nuclei with Continuum $\gamma$ Transitions. Physical Review Letters, American Physical Society, 2008, 101, pp.142502. ⟨10.1103/PhysRevLett.101.142502⟩. ⟨in2p3-00332285⟩

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