Rotational analysis of electronic bands of gaseous MgF

Abstract

Rotational structure in the 0-0, 1-0 and 0-1 bands of the A-X system and in the 0-0 and 1-1 bands of the B-X and C-X systems of MgF has been analysed. A-type doubling is observed in the one component of the A 2II-X 2Σ+ system to be analysed and the variation of this with J suggests that the 2II state is inverted. State C 2Σ+ appears to be a Rydberg state... (σ4s) and the ionization potential is estimated to be 7 68 eV. The internuclear distance in the ground state re" is 1.750 Å.