Calculated fission yields of neutron-deficient mercury isotopes

The recent unexpected discovery of asymmetric fission of ¹⁸⁰Hg following the electron-capture decay of ¹⁸⁰Tl has led to intense interest in experimentally mapping the fission-yield properties over more extended regions of the nuclear chart and compound-system energies. We present here a first calculation of fission-fragment yields for neutron-deficient Hg isotopes, using the recently developed Brownian Metropolis shape-motion treatment. The results for ¹⁸⁰Hg are in approximate agreement with the experimental data. For ¹⁷⁴Hg the symmetric yield increases strongly with decreasing energy, an unusual feature, which would be interesting to verify experimentally.