Pairing correlations with single Cooper pair transfer to individual quantal states

TL;DR

This paper presents a detailed theoretical analysis of two-particle transfer reactions in nuclei, revealing insights into pairing correlations, including phonon-mediated pairing in exotic nuclei like $^{11}$Li, and introduces a new mechanism for gauge symmetry breaking.

Contribution

It develops a comprehensive method combining static and dynamic mean field spectroscopic amplitudes with optical potentials to accurately predict two-particle transfer cross sections in nuclei.

Findings

Quantitative agreement with experimental transfer data

Observation of phonon-mediated pairing in $^{11}$Li

Discovery of bootstrap, pigmy-resonance-mediated Cooper pairing mechanism

Abstract

With the help of the static and dynamic mean field spectroscopic amplitudes, taking into account successive and simultaneous transfer channels properly corrected because of non-orthogonality effects, as well as describing the associated elastic channels in terms of experimentally determined optical potentials, one obtains absolute, two-particle transfer differential cross sections which provide an overall account of the data within experimental errors. One of the first results connected with such quantitative studies of pairing correlations in nuclei is the observation of phonon mediated pairing in the exotic halo nucleus $^{11}$Li, and the associated discovery of a new mechanism to break nuclear gauge symmetry: bootstrap, pigmy-resonance-mediated Cooper pair binding.