Laser magnetic resonance measurement of the 2 3P2–2 3P1 splitting in atomic oxygen

Abstract
The J=2→1 fine‐structure splitting in the ground state of atomic oxygen has been measured by laser magnetic resonance employing an intracavity dc glow discharge to generate the atom. The splitting, observed with the 63.1 μm laser line of 13CH3OH pumped by a CO2 laser, is 158.30298 (7) cm−1.