http://arxiv.org/abs/2212.14766
Microscopic theory of the nuclear response based on the relativistic meson-nucleon Lagrangian is applied to the description of the isoscalar giant monopole resonance (ISGMR) in a variety of nuclear systems. It is shown that the inclusion of beyond-mean-field correlations of the quasiparticle-vibration coupling (qPVC) type in the leading approximation allows for a simultaneous realistic description of the ISGMR in nuclei of led, tin and nickel mass regions, which is difficult on the mean-field level. The calculations are based on the NL3* parametrization of the relativistic finite-range meson-nucleon Lagrangian, which, in combination with the qPVC, have consistently demonstrated the ability to reliably describe many other nuclear structure phenomena. Systematic ISGMR calculations for nickel isotopes help reveal the central role of its coupling to the low-energy quadrupole states in the placement of the ISGMR centroids.
E. Litvinova
Mon, 2 Jan 23
4/44
Comments: N/A