Maintained records, such as pharmacy files, patient profiles, charge system files, inventories, control records for radioactive nuclei, or registries of poisons, narcotics, or controlled drugs. (resumemycareer.com)
They do this by timing the decay of radioactive nuclei, which any physicist will agree occurs at random. (discovermagazine.com)
In a project that began last month, researchers will transport antimatter by truck and then use it to study the strange behaviour of rare radioactive nuclei. (scientificamerican.com)