The procedure of determination of diatomic spectroscopic and molecular parameters from line positions of several isotopomers

The computer procedure for extraction of mass-independent spectroscopic parameters Umj,Δa mj, Δbmj from vibration-rotational line positions of several isotopomers of diatomic molecule is presented. The relations between Umj are used in the procedure. The non-included in the fit the line centers of 7-0 band for HCl molecule were calculated and compared with observed ones.