Programme

O.25 -- Oral, VCTP-50

Date: Thursday, 7 August 2025

Time: 14:40 - 15:05

Possible existence of the pygmy dipole resonance built on excited states

Le Tan Phuc(1,2), Nguyen Dinh Dang(3), Ren Li(4), Nguyen Quang Hung(1,2)

(1) Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City 70000, Vietnam (2) Faculty of Natural Sciences, Duy Tan University, Da Nang City 55000, Vietnam (3) Nuclear Many-Body Theory Laboratory, RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako City, 351-0198 Saitama, Japan (4) KU Leuven, Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium

This report presents recent studies on the formation of the Pygmy Dipole Resonance (PDR) at finite temperatures, i.e., PDR built on excited states. Both experimental and theoretical investigations have confirmed the existence of Pygmy dipole collective oscillations in the low-energy tail of the Giant Dipole Resonance. The findings also reveal isospin mixing at the nuclear surface and indicate a violation of the Brink-Axel hypothesis in the low-energy region.

Presenter: Le Tan Phuc