High-Resolution FTIR Studies of High-temperature Molecules

The results of FTIR studies on high-temperature molecules are presented. High-resolution FTIR spectra of diatomic hydrides AlH, GaH and InH were measured and an analysis of intensity distribution in each spectrum led to the determination of the ratio of dipole moment function (DMF)which were used to estimate the concentration of the molecule. Characteristics of the DMF's were discussed.
A high-resolution FTIR spectrum of AsO radical was measured and its rotational structure was analyzed to determine molecular constants of the molecule in ground electronic state precisely. A global behavior of the spin-coupling parameter in AsO was discussed in terms of mixing of electronic configurations. Finally our future work is briefly presented.