6,374 research outputs found
Nuclear density-functional theory and fission of super-heavy elements
We review the prediction of fission properties of super-heavy elements (SHE)
by self-consistent mean-field models thereby concentrating on the widely used
Skyrme-Hartree-Fock (SHF) approach. We explain briefly the theoretical tools:
the SHF model, the calibration of model parameters together with statistical
analysis of uncertainties and correlations, and the involved computation of
fission lifetimes. We present an overview of fission stability in comparison to
other decay channels over the whole landscape of SHE reaching deep into the
-process domain. The main emphasis lies on a detailed discussion of the
various ingredients determining eventually the fission properties. The main
result is that fission is an involved process which explores many different
influences with almost equal share, basic bulk properties (also known as
liquid-drop model parameters), pairing strengths, and shell effects. %Comment: 9 figures, 1 tabl
Central depression in nuclear density and its consequences for the shell structure of superheavy nuclei
The influence of the central depression in the density distribution of
spherical superheavy nuclei on the shell structure is studied within the
relativistic mean field theory. Large depression leads to the shell gaps at the
proton Z=120 and neutron N=172 numbers, while flatter density distribution
favors N=184 for neutrons and leads to the appearance of a Z=126 shell gap and
to the decrease of the size of the Z=120 shell gap. The correlations between
the magic shell gaps and the magnitude of central depression are discussed for
relativistic and non-relativistic mean field theories.Comment: 5 page
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