Title: Collectivity, shape coexistence and isomerism in lanthanides nuclei close to the proton drip line

Speaker: Prof. C.M. Petrache, IJClab, University of Paris Saclay, France

Time: 16:00 pm, September. 18 (Thursday), 2025

Place: Meeting Room, 6F, Gongyi Building, Lanzhou Nanchang Road Campus

Abstract: 

Recent experimental studies of proton-rich nuclei just above the Z = 50 magic shell performed with state-of-the-art detector setups developed for the observation of very weakly populated states will be presented. Evidence of new isomeric states with short and long lifetimes, of magnetic rotation bands, and of unique states essential for establishing the nature of the collective motion in nuclei, will be discussed. Different modes of manifestation of the prolate-oblate shape coexistence, including those in mid-shell tin nuclei studied with fast timing techniques will also be presented. The evolution of collectivity with increasing spin, as well as along the isotopic chains of iodine and cesium nuclei will be discussed.