THE FAR INFRARED ABSORPTION SPECTRUM OF HYDROGEN SULFIDE

Abstract

An extension of the transition assignments in the rotational spectrum of hydrogen sulfide investigated by Bell, Hansler, and Oetjen (Phys. Rev. 88:174A (1952)) is made for $J = 11$ through $J = 15$, in the region 120 K to 200 K. Rigid rotor energy levels for these J’s are computed, using the rotational constants ${A}_{O} = 10.393 K, {B}_{O} = 9.040 K$, and ${C}_{O} = 4.723 K$: given by Crawford and Cross (J. Chem. Phys. 5:621 (1937)). Centrifugal stretching corrections are made using the method of Kivelson and Wilson (J. Chem. Phys. 20:1575 (1952)). Intensities are computed using an extrapolation of the table of line strengths of Cross, Hainer, and King (J. Chem. Phys. 12: 210 (1944)). For lines lying in the range 120 K to 200 K, Intensities are found to be negligible, save for low $\tau$ transitions, as is to be expected. Several lines are thus assigned. In addition, it is found that a slight change in the rotational constant A brings several of the high $\tau$ transitions previously computed and assigned by Hansler for ${J} < 11$ into better agreement with the actual spectrum.