Self-consistent study of nuclear charge radii in Ca region
Семинары
Семинар «Ядерная физика низких энергий»
Дата и время: пятница, 18 июня 2021 г., в 14:30
Место: Онлайн-конференция в Zoom, Лаборатория теоретической физики им. Н.Н. Боголюбова
Тема семинара: «Self-consistent study of nuclear charge radii in Ca region»
Авторы: И. Н. Борзов1,2, С. В. Толоконников1,3
1 — НИЦ «Курчатовский институт», Москва
1 — Лаборатория теоретической физики ОИЯИ
1 — Московский физико-технчиеский институт, Долгопрудный
Докладчик: И. Н. Борзов
Аннотация:
Fully self-consistent study of the charge radii in the long chains of the Ar to Sc isotopes will be presented.
The neutron-deficient and neutron-rich nuclei with pairing in both neutron and proton sectors, as well as the (semi-) magic nuclei around the closed neutron shells at N=20, 28, 32 are treated within the Energy Density
Functional (EDF) approach with the Fayans functional DF3-a. A comparison with its new options is done, namely
with Fy(stand) and more recent Fy(?r,HFB). The performance of the DF3-a will be discussed in describing both
absolute radii and OES effects found in the CERN-ISOLDE experiments for 36-52Ca and 36-52K isotopes. In addition
to a large-scale parametric fitting of the Fayans EDF, possible improvements will be mentioned:
— extension of the framework for deformed nuclei;
— introducing a modified density gradient term in pairing EDF;
— self-consistent account for the A-dependent fluctuating contribution due to the quasiparticle-phonon coupling.
The latter explains strong increase of the radii at N>28 in Ca isotopes.