Radioactive decay ofU234via Ne and Mg emission

We have identified three modes of radioactive decay of ${}_{}{}^{234}{}_{}{}^{}\mathrm{U}$ by barrier penetration (in addition to alpha decay): emission of a Ne ion, emission of a Mg ion, and spontaneous fission. Lifetimes are (3.7${\pm }_{0.9}^{1.2}$) × ${10}^{17}$, (1.1${\pm }_{0.6}^{1.3}$) × ${10}^{18}$, and (1.9±0.1) × ${10}^{16}$ yr, respectively. This is the first example of a nuclide with four hadronic decay modes.