Rotational spectra of the mixed rare gas dimers Ne–Kr and Ar–Kr

Abstract

Pure rotational spectra of several isotopomeric species of the rare gas dimers Ne–Kr and Ar–Kr have been measured using a pulsed jet cavity microwave Fourier transform spectrometer. Equilibrium internuclear distances have been evaluated by taking advantage of the isotopic data, for both these dimers and three Xe-containing dimers, whose spectra were reported earlier [Jäger et al., J. Chem. Phys. 99, 919 (1993)]. The dipole moments have been estimated using the ‘‘π/2-pulse’’ excitation condition. 83Kr nuclear quadrupole hyperfine structure has been observed in some rotational transitions of 20Ne–83Kr and of Ar–83Kr, and the corresponding quadrupole coupling constants have been derived.