Non-Axial Octupole Deformations and Tetrahedral Symmetry in Heavy Nuclei

Journal Article · Mon Nov 21 04:00:00 EST 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2140643· OSTI ID:20719707

Mazurek, Katarzyna ^[1]; Dudek, Jerzy ^[2]

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1. Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Cracow (Poland)
2. Institut de Recherches Subatomiques, F-67037 Strasbourg Cedex 2 (France)

The total energies of about 120 nuclei in the Thorium region have been calculated within the macroscopic-microscopic method in the 5-dimensional space of deformation parameters {alpha}20, {alpha}22, {alpha}30, {alpha}32 and {alpha}40. The macroscopic energy term contains the nuclear surface-curvature dependence as proposed within the LSD approach. The microscopic energies are calculated with the Woods-Saxon single particle potential employing the universal set of parameters.We study a possible presence of the octupole axial and non-axial degrees of freedom all-over in the ({beta}, {gamma})-plane focussing on the ground-states, secondary minima and in the saddle points. In fact, a competition between axial and tri-axial octupole deformation parameters is obtained at the saddle points and in the secondary minima for many isotones with N > 136. The presence of the tetrahedral symmetry minima is predicted in numerous nuclei in the discussed region, although most of the time at relatively high excitation energies.

• OSTI ID: 20719707
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 802; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BINDING ENERGY
DEFORMED NUCLEI
DEGREES OF FREEDOM
EXCITATION
GROUND STATES
HEAVY NUCLEI
ISOTONIC NUCLEI
OCTUPOLES
SYMMETRY
THORIUM
WOODS-SAXON POTENTIAL