The gamma decay associated with the warm rotation of the superdeformed nuclei Tb-151 and Pb-196 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.
Probing the order-to-chaos region in superdeformed Tb-151 and Pb-196 nuclei with continuum gamma transitions / S. Leoni, G. Benzoni, N. Blasi, A. Bracco, S. Brambilla, F. Camera, A. Corsi, F.C.L. Crespi, P. Mason, B. Million, D. Montanari, M. Pignanelli, E. Vigezzi, O. Wieland, M. Matsuo, Y.R. Shimizu, D. Curien, G. Duchene, J. Robin, P. Bednarczyk, M. Castoldi, B. Herskind, M. Kmiecik, A. Maj, W. Meczynski, J. Styczen, M. Zieblinski, K. Zuber, A. Zucchiatti. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 101:14(2008 Oct 03), p. 142502.142502.
Probing the order-to-chaos region in superdeformed Tb-151 and Pb-196 nuclei with continuum gamma transitions
S. Leoni;G. Benzoni;A. Bracco;F. Camera;A. Corsi;F.C.L. Crespi;P. Mason;D. Montanari;M. Pignanelli;
2008
Abstract
The gamma decay associated with the warm rotation of the superdeformed nuclei Tb-151 and Pb-196 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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