九大原子核セミナー

2016年12月16日(金) 16:30〜18:00

講師：Costel Petrache(University Paris-Sud, CSNSM, CNRS/IN2P3)

演題：Transverse wobbling and new chiral modes in lanthanide nuclei

場所：ウェスト1号館7階 物理学部門会議室 (W1-A-711室)

概要：
The wobbling motion and the chiral symmetry breaking are unique
fingerprints of triaxiality in nuclei and have been intensively studied
in recent years. We were involved in the study of Ce and Nd nuclei: at
high spins we identified bands interpreted as the manifestation of a
stable triaxial nuclear shape, presenting various types of collective
motion, like tilted axis and principal axis rotation, wobbling motion,
chiral bands. New types of chiral and wobbling motions will be
discussed. Chiral bands in even-even nuclei, which are not predicted by
the existing 3D TAC models, are instead predicted by the Generalized
Coherent State Model. The possible experimental evidence of such bands
will be discussed. The wobbling motion proposed in normal-deformed
nuclei at low spins, with transverse or longitudinal geometry of the
collective and single-particle angular momenta, will be discussed.
Recently obtained results, as well as the experimental and theoretical
challenges in the study of the wobbling modes will be presented.