R. FUJIMORI, Y. HIRATA, K. KAWAGUCHI, Department of Chemistry, Faculty of Science, Okayama University, 3-1-1, Tsushima-Naka, Okayama 700-8530, JAPAN; I. MORINO, Satellite Remote Sensing Research Section, Center for Global Environmental Research, National Institute for Environmental Studies Onogawa 16-2, Tsukuba, Ibaraki 305-8506, JAPAN.
Since HF is known as interstellar species, the protonated HF may exist with detectable abundance. Vibration-rotation spectra of H2F+ 1 and 3 bands were studied by infrared laser spectroscopy. The 2 band and pure rotational spectra have not been reported. In this study, we report FTIR spectroscopy of H2F+ 1, 3 and 2 bands. The ion was produced with hollow cathode discharge in F2, He and H2 mixture. A simultaneous analysis of FT data combined with laser spectroscopic data was curried out for 1 and 3 bands, to determine ground state molecular constants. Absorption lines in the 2 region were assigned by using the ground state combination differences. Determined molecular constants can be used to predict pure rotational transition frequencies.