Effect of non-axial octupole shapes in heavy and superheavy nuclei

P. Jachimowicz, M. Kowal, and J. Skalski
Phys. Rev. C 95, 034329 – Published 30 March 2017

Abstract

We search for effects of tetrahedral deformation β32 over a range of 3000 heavy and superheavy nuclei, 82Z126, using a microscopic-macroscopic model based on the deformed Woods-Saxon potential, well tested in the region. We look for the energy minima with a nonzero tetrahedral distortion, both absolute and conditional—with the quadrupole distortion constrained to zero. In order to assure reliability of our results we include the ten most important deformation parameters in the energy minimization. We could not find any cases of stable tetrahedral shapes. The only sizable—up to 0.7 MeV—lowering of the ground state occurs in superheavy nuclei Z120 for N=173188, as a result of a combined action of two octupole deformations: β32 and β30, in the ratio β32/β303/5. The resulting shapes are moderately oblate, with the superimposed distortion β33 with respect to the oblate axis, which makes the equator of the oblate spheroid slightly triangular. Almost all found conditional minima are excited; a handful of them are degenerate with the axial minima.

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  • Received 26 January 2017

DOI:https://doi.org/10.1103/PhysRevC.95.034329

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

P. Jachimowicz

  • Institute of Physics, University of Zielona Góra, Szafrana 4a, 65-516 Zielona Góra, Poland

M. Kowal* and J. Skalski

  • National Centre for Nuclear Research, Hoża 69, 00-681 Warsaw, Poland

  • *michal.kowal@ncbj.gov.pl

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Issue

Vol. 95, Iss. 3 — March 2017

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