Infrared laser spectroscopy of free radicals and ions. I. The fundamental band of NF(X 3 Ʃ - )

Abstract

The fundamental absorption band of the NF free radical in its 3 Ʃ - ground state has been measured using a tunable diode laser spectrometer. The positions of fifty-one transitions in both P and R branches were accurately calibrated against reference gas lines. Analysis of the spectrum yields a value for the band centre of 1123.2788 (30) cm -1 and equilibrium rotational parameters: B e 1.205679 (160) cm -1 ; α e 0.014889 (160) cm -1 ; D e 5.6 (8) x 10 -6 cm -1 .