Department seminar

Date and time: 20 December 2016 (Tuessday), 4:00 pm
Venue: Seminar Hall

Title: Wobbling and other exotic quantal rotation in atomic nuclei

Speaker: Prof. Umesh Garg, University of Notre Dame, USA

Abstract: Wobbling is a phenomenon associated with triaxial nuclei. The concept of transverse wobbling involves alignment of the odd-particle along the "short" axis of an odd-A triaxial nucleus. We have observed transverse wobbling bands in the nucleus 135Pr. This is the first time that wobbling bands have been observed in a mass region other than A∼160 where the phenomenon of wobbling was first discovered. The concept of nuclear tidal waves is based on the observation that the yrast states in a phonon multiplet represent waves that travel over the nuclear surface akin to tidal waves over the ocean surface. This accounts for the experimental result that the yrast states in vibrational nuclei have a rotational-like structure for which a sound theoretical basis, especially at higher spins, has been lacking so far. In our measurements of B(E2)'s in the yrast band of 102Pd, we have found consonance with the theoretical expectations.