PARTICLE-VIBRATION COUPLING AND PAIRING CORRELATIONS

4 Mar 2025, 15:05
20m
Main Lecture Hall (University of Aizu)

Main Lecture Hall

University of Aizu

90 Kamiiawase, Tsuruga, Itsukimachi, Aizu-Wakamatsu, Fukushima, 965-0006 Japan.

Speaker

Dr Enrico Vigezzi

Description

I will present results concerning the effects of particle-vibration coupling (PVC),
a topic to which Ikuko Hamamoto gave fundamental contributions.

I will discuss how to determine the PVC strength, in particular through
the study of multiplet splittings.
I will then present quantitative microscopic calculations of the
strength function associated with pairing modes in A+2 nuclei
going beyond the RPA by including the coupling to collective excitations of
closed shell A core, including continuum effects. The formalism accounts both
for single-particle self-energy effects and for the pairing interaction
induced by phonon exchange. Such studies are relevant for the experimental searches of
collective high-lying pairing vibration, whose existence was predicted
but not yet experimentally confirmed.

Type of contribution
Are you a student or postdoc? no

Primary author

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