Resolution of the discrepancies concerning the optical and microwave values for B 0 and D 0 of the X 3Σg- state of O 2
The discrepancies concerning the optical and microwave values of B0 and D0 for the X3Σg- state of O 2 have been removed by a nonlinear least-squares fit to all of the lines of the O 2, b 1Σg+-X 3Σg- Red Atmospheric bands recorded by Babcock and Herzberg ( Astrophys. J., 108, 167, 1948). The resulting values for B0″ and D0″ are in excellent agreement with the Raman and microwave values. Improved values are determined for B1″, D1″, γ1″ (spin-rotation), and ∊1″ (spin-spin). Both γv″ and ∊v″ increase in magnitude from v″ = 0 to v″ = 1. Improved Dunham Yi0 and Yi1 expansion coefficients are determined for the b 1Σg+ state, from which the Rydberg-Klein-Rees potential is constructed.