193Os
193Os is an unstable isotope of osmium. Osmium is a chemical element with the symbol Os and atomic number 76. It is a rare, hard, brittle, bluish-white transition metal in the platinum group. 193Os is a radioactive isotope, meaning its nucleus contains an excess of neutrons or protons and is therefore unstable. Like other radioactive isotopes, 193Os decays over time, emitting radiation. The primary decay mode for 193Os is beta decay, where a neutron in the nucleus transforms into a proton, an electron (beta particle), and an antineutrino. This decay process results in the formation of a daughter nuclide, which in this case is iridium-193 (193Ir). Iridium is the element with atomic number 77.
The half-life of 193Os is approximately 31.5 hours. This half-life indicates the time it takes for half