Results of Microscopic Self-Consistent Theory of Quasiparticle—Phonon Interaction in Nuclei


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Аннотация

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.

Авторлар туралы

S. Kamerdzhiev

National Research Center Kurchatov Institute

Хат алмасуға жауапты Автор.
Email: kamerdzhiev_sp@nrcki.ru
Ресей, Moscow, 123182

O. Achakovskiy

Leipunsky Institute of Physics and Power Engineering

Email: kamerdzhiev_sp@nrcki.ru
Ресей, Obninsk, Kaluga oblast, 249033

S. Tolokonnikov

National Research Center Kurchatov Institute; Moscow Institute of Physics and Technology

Email: kamerdzhiev_sp@nrcki.ru
Ресей, Moscow, 123182; Dolgoprudnyi, Moscow oblast, 141700

M. Shitov

National Research Center Kurchatov Institute

Email: kamerdzhiev_sp@nrcki.ru
Ресей, Moscow, 123182

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© Pleiades Publishing, Ltd., 2019