248 research outputs found
Potential energy surfaces of actinide and transfermium nuclei from multi-dimensional constraint covariant density functional theories
Multi-dimensional constrained covariant density functional theories were
developed recently. In these theories, all shape degrees of freedom
\beta_{\lambda\mu} deformations with even \mu are allowed, e.g., \beta_{20},
\beta_{22}, \beta_{30}, \beta_{32}, \beta_{40}, \beta_{42}, \beta_{44}, and so
on and the CDFT functional can be one of the following four forms: the meson
exchange or point-coupling nucleon interactions combined with the non-linear or
density-dependent couplings. In this contribution, some applications of these
theories are presented. The potential energy surfaces of actinide nuclei in the
(\beta_{20}, \beta_{22}, \beta_{30}) deformation space are investigated. It is
found that besides the octupole deformation, the triaxiality also plays an
important role upon the second fission barriers. The non-axial
reflection-asymmetric \beta_{32} shape in some transfermium nuclei with N =
150, namely 246Cm, 248Cf, 250Fm, and 252No are studied.Comment: 7 pages, 6 figures; invited talk at the International Conference on
Nuclear Structure and Related Topics, Jul 02-July 7, 2012, Dubn
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