title: Evidence for phonon mediated pairing interaction in the halo of the nucleus ¹¹Li.
abstract: With the help of a unified nuclear-structure-direct-reaction theory we analyze the reaction ¹H(¹¹Li,⁹Li)³H. The two halo neutrons are correlated through the bare and the induced (medium polarization) pairing interaction. By considering all dominant reaction channels leading to the population of the 1/2⁻ (2.69 MeV) first excited state of ⁹Li, namely, multistep transfer (successive, simultaneous, and nonorthogonality), breakup, and inelastic channels, it is possible to show that the experiment provides direct evidence of phonon mediated pairing.
authors.affiliation: Dipartimento di Fisica, Università di Milano, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Potel
authors.forename: F
authors.initials: F
authors.lastname: Barranco
authors.forename: E
authors.initials: E
authors.lastname: Vigezzi
authors.forename: R A
authors.initials: RA
authors.lastname: Broglia