Speaker
Description
The self-consistent method for studying second-order anharmonic effects, within the framework of many-body quantum theory, is used for the first time to investigate the role of spin-spin forces in the probabilities of transitions between low-lying one-phonon states. Our approach includes accounting for: 1) self-consistency between the mean field and effective interaction based on the use of the energy density functional method with the proven parameters of Fayans functional DF3-a [1], 2) three-quasiparticle correlations in the ground state, 3) nuclear polarizability effects and 4) spin-spin interactions. E1-transitions between one-phonon 3-1 and 2+1 states in semimagic tin isotopes were studied. Good agreement with experiment [2] was obtained. It is shown that three-quasiparticle correlations in the ground state make a significant contribution to the value under study, as in our previous calculations for the EL transitions between first 3- and 2+ states in magic nuclei [3]. The specificity of this problem in nuclei with pairing and the effects of the spin components of the phonon creation amplitude are considered.
- S. V. Tolokonnikov, E. E. Saperstein, Phys. Atom.Nucl. 73, 1684 (2010).
- L. I. Govor, A. M. Demidov, O. K. Zhuravlev, et al., Sov. J. Nucl. Phys. 54, 196 (1991).
- S. P. Kamerdzhiev, D. F. Voitenkov, E. E. Sapershtein, S. V. Tolokonnikov, and M. I. Shitov, JETP Lett. 106, 139 (2017).
