Speaker
Description
Isotopic dependence of charge and matter radii.
I.N. Borzov 1,2, S.V. Tolokonnikov1,3
1 National Research Centre “Kurchatov Institute”, Moscow, Russia
2Bogolubov Laboratory of Theoretical Physics, Joint Institute of Nuclear Research, Dubna, Russia
3 Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Russia
†E-mail: Borzov_IN@nrcki.ru, cc: ibor48@mail.ru
Fully self-consistent study of the charge and matter radii in the chains of the Ar - Ti, Ni, Cu isotopes is presented. The nuclei with pairing in both neutron and proton sectors are treated within the Energy Density Functional (EDF) approach with the Fayans functional DF3-a [1]. Recently the new option of this functional named Fy(∆r,HFB) has become popular [2]. We compare their performance in describing both isotopic trend of the radii and odd-even staggering (OES) found in the CERN-ISOLDE experiments for 36-52Ca [2] and 36-52K [3] isotopes (Figs.1,2). For K, Ca, Sc isotopes, the calculated differential charge radii δ<r2> relative to N = 28 show universal increase independent on the mass number A in agreement with the data [2-3]. Strong increase of the radii at N>28 in K, Ca, Sc isotopes (Fig.1b) is explained by A-dependent contribution of the quasiparticle-phonon coupling [4,5]. The corresponding 3-point filters Δ(3) for the binding energies and radii are consistent with magicity of the N=20, 28, 32 shells in K isotopes [5] (Fig.2). Supported by the grant of Russian Scientific Foundation (RSF 21-12-00061).
Fig. 1. a) The differential charge radii of K, Ca, Sc isotopes calculated within the DF3-а functional compared to the data [2,3]. b) An impact of the quasiparticle-phonon coupling on the differential charge radii of Ca, isotopes[4].
Fig. 2. The 3-point filters Δ(3) for binding energies and charge radii of K isotopes calculated from the DF3-a functional with (red) and without (blue) gradient paring vs the data [3].
- S.V. Tolokonnikov, E.E. Saperstein, Phys. At. Nucl. 74, 1277 (2011).
- A.J. Miller et.al. Nature Physics, 15, 432 (2019).
- A.Koszorus et.al. Nature Physics, https://doi.org/10.1038/s41567-020-01136-5 (2020).
- E.E. Saperstein, I.N. Borzov, S.V. Tolokonnikov, JETP Letters, 104,417 (2016).
- I.N. Borzov, S.V. Tolokonnikov, Phys.At.Nucl. 85(3) (2022).
| The speaker is a student or young scientist | No |
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| Section | 1. Nuclear structure: theory and experiment |
