COLLECTIVE FEATURES OF DIPOLAR RESPONSE IN NUCLEAR SYSTEMS WITHIN SCHEMATIC AND TRANSPORT MODELS

Virgil Baran1,2, Cosmin Cipu1, and Darius-Matei Banu1

Abstract. The collective nature and the vibrational structure of the dipolar response in nuclear systems is investigated within a self-consistent mean-field model based on Vlasov equation. We study the role of the variation with density of the symmetry energy, in parametrizations based on Skyrme interactions, on the emergence oflow-lying, Pygmy Dipole Response (PDR) in neutron rich systems. The predictions of the transport model are then compared with the results obtained within a RPA aproaches based on extended separable interactions, able to encode the dependence of nuclear symmetry energy on density. Our results provide insights upon the transition from skin oscillation to a highly bulk collective dynamics.

Keywords: Pygmy dipole resonance, Vlasov equation, Separable residual interactions.

DOI   10.56082/annalsarsciphyschem.2026.1.29

1Faculty of Physics, University of Bucharest, Atomistilor 405, Magurele, Romania
2Academy of Romanian Scientists, Strada Ilfov 3, Bucharest, Romania
E-mail: virgil.baran@unibuc.ro

Download articleTHE COLLECTIVE NATURE AND THE VIBRATIONAL STRUCTURE OF THE DIPOLAR RESPONSE IN NUCLEAR SYSTEMS

PUBLISHED in

Annals Academy of Romanian Scientists
Series on Physics and Chemistry

Volume 11 no 1, 2026


     
ISSN PRINT 2537-4761
ONLINE ISSN   2559-1061 

PUBLISHED in Annals of the Academy of Romanian Scientists Series on Physics and Chemistry, Volume 11, No1