4.5 Article

Interweaving of elementary modes of excitation in superfluid nuclei through particle-vibration coupling: Quantitative account of the variety of nuclear structure observables

Journal

PHYSICAL REVIEW C
Volume 92, Issue 3, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.92.031304

Keywords

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Funding

  1. Academy of Finland and University of Jyvaskyla within the FIDIPRO program
  2. Helmholtz Association through the Nuclear Astrophysics Virtual Institute [VH-VI-417]
  3. Helmholtz International Center for FAIR within the framework of the LOEWE program launched by the State of Hesse

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A complete characterization of the structure of nuclei can be obtained by combining information arising from inelastic scattering, Coulomb excitation, and gamma-decay, together with one- and two-particle transfer reactions. In this way it is possible to probe both the single-particle and collective components of the nuclear many-body wave function resulting from the coupling of these modes and, as a result, diagonalizing the low-energy Hamiltonian. We address the question of how accurately such a description can account for experimental observations in the case of superfluid nuclei. Our treatment goes beyond the traditional approach, in which these properties are calculated separately, and most often for systems near closed shells, based on perturbative approximations (weak coupling). It is concluded that renormalizing empirically and on equal footing bare single-particle and collective motion of open-shell nuclei in terms of self-energy (mass) and vertex corrections (screening), as well as particle-hole and pairing interactions through particle-vibration coupling (PVC), leads to a detailed, quantitative account of the data, constraining the possible values of the k mass, of the S-1(0) bare N N interaction, and of the PVC strengths within a rather narrow window.

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