Abstract
A self-consistent approach in the problem of taking into account quasiparticle-phonon interaction provides a high predictive power and is free from adjustable parameters (this is of crucial importance for astrophysics). Moreover, it is consistent and makes it possible to take into account new effects. A brief survey of the results obtained within this approach on the basis of Skyrme or Fayans functionals by employing the smallness parameter g2, where g is the phonon-production amplitudes, with allowance for tadpole effects is presented. The contribution of quasiparticle-phonon interaction to ground-state electromagnetic moments of odd nuclei; second-order anharmonic effects in g2, including quadrupole moments of the first 2+ and 3− states and EL transitions between one-phonon states; third-order anharmonic effects; pygmy dipole and giant resonances; and the contribution of quasiparticle-phonon interaction to radiative properties of nuclear reactions are considered. For magic and semimagic nuclei, additional effects and structures arising in nuclear features because of quasiparticle-phonon interaction are discussed along with new—that is, three- and four-quasiparticle ground-state—correlations. Earlier unknown values of the above features, including the features of the pygmy dipole resonance in neutron-rich nickel isotopes, are predicted. It is shown that, in all of the aforementioned problems, the contributions of quasiparticle-phonon interaction is sizable, is of fundamental importance, and is necessary for explaining experimental data.
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Acknowledgments
We are grateful to the Organizing Committee of the 68th International Conference “Nucleus-2018” for providing us with the possibility of presenting this article in the form of a report at a plenary meeting of this conference. Of course, the results obtained in the theoretical studies performed within the period spanning 2012 and 2018 and quoted in [26–107] (see the list of references in the present article) could not be described in sufficient detail either in that report or in the present article. We are grateful to the authors of those articles for their contribution to the aforementioned studies and for enlightening discussions.
Funding
This work was supported by Russian Science Foundation (grant no. 16-12-10155).
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Russian Text © The Author(s), 2019, published in Yadernaya Fizika, 2019, Vol. 82, No. 4, pp. 320–338.
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Kamerdzhiev, S.P., Achakovskiy, O.I., Tolokonnikov, S.V. et al. Results of Microscopic Self-Consistent Theory of Quasiparticle—Phonon Interaction in Nuclei. Phys. Atom. Nuclei 82, 366–384 (2019). https://doi.org/10.1134/S1063778819040100
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DOI: https://doi.org/10.1134/S1063778819040100