positron emission
radioactive decay in which a proton is converted into a neutron while releasing a positron and a neutrino
en-US/ˈpɑzəˌtɹɑn ɪˈmɪʃən/
en-GB/pɒzɪtɹɒn ɪˈmɪʃən/
radioactive decay in which a proton is converted into a neutron while releasing a positron and a neutrino