Difference between stable and exotic nuclei: medium polarization effects

Abstract

The bare NN-potential, parametrized so as to reproduce the nuclear phase shifts leads to a sizable Cooper pair binding energy in nuclei along the stability valley. It is a much debated matter whether this value accounts for the "empirical" value of the pairing gap or whether a similarly important contribution arises from the exchange of collective vibrations between Cooper pair partners. In keeping with the fact that two-particle transfer reactions are the specific probe of pairing in nuclei, and that exotic halo nuclei like 11Li are extremely polarizable, we find that the recent studied reaction, namely 11Li+p -> 9Li+t, provides direct evidence of phonon mediated pairing in nuclei.

References in corpus (2)

• Measurement of two-halo neutron transfer reaction p(${}^{11}$Li,${}^9$Li)t at 3$A$ MeV
• Direct observation of the glue pairing the halo of the nucleus 11Li

Cited by in corpus (4)

• Odd-even staggerings on nuclear binding energy described by the covariant density functional theory
• The 9Li(d,p) reaction, a specific probe of 10Li, paradigm of parity--inverted nuclei around N=6 closed shell
• Characterization of vorticity in pygmy resonances and soft-dipole modes with two-nucleon transfer reactions
• Pygmy resonances: what's in a name?