The Role of Ground State Correlations in the Single-Particle Strength of Odd Nuclei with Pairing

Abstract

A method based on the consistent use of the Green function formalism has been developed to calculate the distribution of the single-particle strength in odd nuclei with pairing. The method takes into account the quasiparticle-phonon interaction, ground state correlations and a "refinement" of phenomenological single-particle energies and pairing gap values from the quasiparticle-phonon interaction under consideration. The calculations for 121Sn and 119Sn that were performed in the quasiparticle$\otimes$phonon approximation, have shown a reasonable agreement with experiment. The ground state correlations play a noticeable role and mostly improve the agreement with experiment or shift the results to the right direction.

arXiv comment11 pages

Cited by in corpus (10)

• Covariant theory of particle-vibrational coupling and its effect on the single-particle spectrum
• Quasiparticle-vibration coupling in relativistic framework: shell structure of Z=120 isotopes
• Solution of the Dyson equation for nucleons in the superfluid phase
• Quasiparticle Renormalization and Pairing Correlations in Spherical Superfluid Nuclei
• Nuclear response theory with multiphonon coupling in a covariant framework
• Many-body correlations in nuclear superfluidity
• Polarization corrections to single-particle energies studied within the energy-density-functional and QRPA approaches
• Nuclear superfluidity at finite temperature
• Many-body theory for quasiparticle states in superfluid fermionic systems
• Off-shell pairing correlations from meson-exchange theory of nuclear forces