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Tidal Waves and Onset of Collectivity above N = 126

W. Reviol D.G. Sarantites X. Chen M. Montero O.L. Pechenaya J. Snyder R.V.F. Janssens M.P. Carpenter C.J. Chiara T.L. Khoo T. Lauritsen C.J. Lister D. Seweryniak S. Zhu K. Hauschild 1 A. Lopez-Martens 1 D.J. Hartley S. Frauendorf
1 CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
Abstract : Recent experiments in the actinide region, using Gammasphere and the evaporation residue detector HERCULES, have covered the territory between N = 126 and the center of static octupole deformation at N = 134. The Th-220 nucleus and the neighboring Ra-218 and Th-219 nuclei mark the emergence of quadrupole-octupole collectivity in this mass region. Their octupole bands have B(E1)/B(E2) ratios which are typical for the region, but the level spacings do not concur with a rotational-like behavior. In addition, a spin-dependent staggering of the B(E1)/B(E2) ratios is evident. These features can be described, based on a phonon picture, by a constant-frequency tidal-wave mode for a reflection-asymmetric nuclear surface.
keyword : NUCLEI SPECTROSCOPY GAMMASPHERE OCTUPOLE STATES
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Submitted on : Friday, May 27, 2011 - 5:12:02 PM
Last modification on : Wednesday, September 16, 2020 - 4:17:46 PM

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W. Reviol, D.G. Sarantites, X. Chen, M. Montero, O.L. Pechenaya, et al.. Tidal Waves and Onset of Collectivity above N = 126. Conference on Nuclear Physics - Extremes of the Nuclear Landscape, Aug 2010, Zakopane, Poland. pp.671-680, ⟨10.5506/APhysPolB.42.671⟩. ⟨in2p3-00596541⟩

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