Diode laser spectroscopy of the four radicals, CdD, ZnD, BaD, and SrD, in their2sum; ground state

摘要

The infrared spectra of several isotopic forms of the monodeuterides of the metals cadmium, zinc, barium, and strontium have been measured in their ground electronic state (2sum;) in the gas phase using a diode laser spectrometer. The analysis of the experimental data was carried out in two ways: (a) a complete set of Dunham parameters was determined for each isotopic species independently and (b) all the available data over both deuterated and protonated species of a particular compound were simultaneously fitted to obtain a set of masshyphen;independent parameters. Mass scaling coefficients, which take into account effects such as a breakdown of the Bornndash;Oppenheimer approximation, were determined for the hydrogen atom.