Phys.Rev. C 93, 044304 (2016)

S.E.Agbemava, A.V.Afanasjev, P.Ring

Octupole deformation in the ground states of even-even nuclei: A global analysis within the covariant density functional theory

NUCLEAR STRUCTURE ^56,60Ca, ⁷⁸Sr, ^{78,80,108,110,112}Zr, ⁸²Mo, ⁹⁰Cd, ^{108,110,112,142,144}Xe, ^{108,110,112,114,116,142,144,146,148,150}Ba, ^{114,144,146,148,150}Ce, ^146,148,150Nd, ¹⁵⁰Sm, ^{196,198,200,202}Gd, ^200,202,204Dy, ^{198,200,202,204}Er, ²⁰⁴Yb, ²¹⁰Os, ²¹⁴Pt, ^216,218Hg, ^{180,182,184,216,218,220,222}Pb, ^218,220,222Po, ^{218,220,222,224,226,232}Rn, ^{218,220,222,224,226,228,230}Ra, ^{220,222,224,226,228,230,232,236,288,290,292,294}Th, ^{220,222,224,226,228,230,232,234,238,290,292,294,296}U, ^{222,224,226,228,230,232,234,240,288,290,292,294,296}Pu, ^{224,226,228,230,232,234,236,242,286,288,290,292,294,296,298}Cm, ^{224,226,228,230,232,234,236,238,288,290,292,294,296,298,300}Cf, ^{226,228,232,234,236,238,240,290,292,294,296,298,300,302}Fm, ^{236,238,240,242,284,286,288,290,292,294,296,298,300,302,304,306}No, ^{242,244,246,288,290,292,294,296,298,300,304,306,308}Rf, ^{248,250,288,290,292,294,300,302,304,306}Sg; calculated equilibrium β₂, β₃ deformation parameters for ground states using DD-PC1 and NL3* density functional models and ϵ₂, ϵ₃ parameters by mic-mac (MM) approach, potential energy surfaces in (β₂, β₃) plane using CEDF DD-PC1 theory. Covariant energy density functionals (CEDF) of different types, with a nonlinear meson coupling, with density-dependent meson couplings, and pairing correlations within relativistic Hartree-Bogoliubov theory. Predicted a new region of octupole deformation around Z=98 and N=196. Comparison with available experimental data.

doi: 10.1103/PhysRevC.93.044304