Speaker
Description
Static octupole deformation, also called reflection asymmetric by contrast with the quadrupole deformation, displays a profound signature on the observables and systematics of the nuclear ground state $[1]$ and are expected to manifest mostly in the heavier Actinides region of the nuclear chart. Such deformations present a non-negligible impact on the excitation spectra and nuclear properties, for example on the nuclear Schiff moment $[2]$, thus posing important tests for theoretical nuclear structure models.
The typical Skyrme energy density functional of a nuclear density functional theory encompasses many nuclear properties, giving rise to a variety of Skyrme-based EDFs, each adjusted using experimental measurements, and of which results are then compared to nuclear data $[3]$.
In order to further improve accuracy, Fayans EDFs have been recently developed, enriching the current-generation EDFs with the Fayans pairing term $[4]$, and have been successfully tested on various isotopic chains via the comparison with
state-of-the-art charge radii measurements $[5][6][7]$.
Based on earlier theoretical surveys in which some Actinides clusters present significant octupole deformation $[8]$, our work aims to both verify the expected precision of the newly-adjusted Fayans functionals and confirm their stronger octupole preponderance.
As such, we present a first-of-its-kind systematic survey of octupole deformation and associated nuclear properties computed by Fayans EDFs, of which we compared the results to recent studies on pear-shaped nuclei $[9]$. Moreover, these new functionals manifest promising results regarding odd-even effects, namely on radii, within isotopic chains.
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