Potential energy surfaces of superheavy nuclei

Details Potential energy surfaces of superheavy nuclei Potential energy surfaces of superheavy nuclei

1999-02-23

arxiv.org/abs/nucl-th/9902058v1

Phys.Rev.C58:2126-2132,1998

Physics

Nuclear Physics

Nuclear Theory

8 pages RevTeX, 6 figures

Scientific paper

10.1103/PhysRevC.58.2126

We investigate the structure of the potential energy surfaces of the superheavy nuclei 258Fm, 264Hs, (Z=112,N=166), (Z=114,N=184), and (Z=120,N=172) within the framework of self-consistent nuclear models, i.e. the Skyrme-Hartree-Fock approach and the relativistic mean-field model. We compare results obtained with one representative parametrisation of each model which is successful in describing superheavy nuclei. We find systematic changes as compared to the potential energy surfaces of heavy nuclei in the uranium region: there is no sufficiently stable fission isomer any more, the importance of triaxial configurations to lower the first barrier fades away, and asymmetric fission paths compete down to rather small deformation. Comparing the two models, it turns out that the relativistic mean-field model gives generally smaller fission barriers.

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