MeV One million electron volts. This is a unit used to specify the energy of ionizing radiation. Monitoring Checking for presence of sources of radiation under a specific set of conditions. Monitoring includes measurements of levels of radiation or concentrations of radioactivity. N Neutrons Electrically neutral particles with a mass of about 1 amu.
Neutrons can interact with nuclei and transmute stable nuclides into radioactive nuclides.
P Personnel Dosimetry Determination of the cumulative dose of radiation to an individual by various means. They are emitted from the nucleus in the same manner as negatively charged electrons. The process results in a proton being transformed to a neutron. The resulting nucleus will have one less positive charge and the same mass number as the original nucleus. Positrons are emitted with a spectrum of energies.