Towards a comprehensive study of quantum phase transitions in atomic nuclei.

by Dr. Noam Gavrielov

Grand Accélérateur National d'Ions Lourds, France

at Particles and Fields Seminar

Mon, 01 Jan 2024, 14:00
Sacta-Rashi Building for Physics (54), room 207

Abstract

Quantum phase transitions (QPTs) are a highly investigated phenomenon in
nuclear physics, both theoretically and experimentally, where many rare isotope
beam facilities investigate a plethora of nuclei in order to understand their
evolution in shape and shape coexistence that includes multiple shell model
configurations. In this talk I will discuss my attempt to understand such
phenomenon using algebraic frameworks. Specifically, I will present the
interacting boson model (IBM) for even-even nuclei. This model allows one to
investigate a vast array of phenomena with a great insight on the symmetry
structure of the nucleus and at a low computational cost. Using an extension
of this framework to multiple configurations named the IBM with configuration
mixing (IBM-CM), I will present my work on the chain of zirconium isotopes
(Z=40) with mass numbers A=92-110 and the manifestation of the new notion of
intertwined quantum phase transitions (IQPTs). IQPT is a situation where a QPT
involving a crossing of two configurations is accompanied by a shape evolution
of each configuration with its own separate QPT. Furthermore, I will focus on
my ongoing project developed at Yale, introducing a novel model for
configuration mixing in odd-mass nuclei, termed the interacting boson-fermion
model with configuration mixing (IBFM-CM). Using this framework, I will present
my work on the odd-mass niobium isotopes (Z=41) with mass numbers A=93-103 and
the manifestation of IQPTs within this chain of isotopes. To conclude, I will
provide a brief overview of my other ongoing projects and some prospective ones
at the Grand Accelerateur National d'Ions Lourds (GANIL).

Created on 26-12-2023 by Lublinsky, Michael (lublinm)
Updaded on 26-12-2023 by Lublinsky, Michael (lublinm)