beta particle 1 topic · 1 source ScienceNuclear PhysicsA high-speed electron or positron, emitted in radioactive decay.National Tritium Labeling Facility (NTLF) at Lawrence Berkeley National Laboratory (LBNL) — Environmental Health Risk Assessment for Tritium Released at the National Tritium Labeling Facility (NTLF) at Lawrence Berkeley National Laboratory (LBNL) retrieved 2014-05-20 Cite