15min:

DMITRY G. MELNIK, MYKOLA BATAIEV, TERRY A. MILLER, The Ohio State University, Dept. of Chemistry, Laser Spectroscopy Facility, 120 W. 18th Avenue, Columbus, Ohio 43210; AND FRANK C. DE LUCIA, The Ohio State University, Dept. of Physics, Microwave Laboratory, 174 W. 18th Avenue, Columbus OH 43210.

Previously, we have reported the 0₀ 1₀ vibrational-tunneling-rotational (VTR) transition in the Ar ND₃ complex. Here we report the first observation of the corresponding transition in in the Ne ND₃ and Kr ND₃ complexes using a pulsed jet FASSST spectrometer operating in the 195-298 GHz region. The inversion components of the VTR band corresponding to different nuclear spin states, are observed for all complexes Rg ND₃ (Rg = Ne, Ar, Kr). The experimental data were fit to a pseudo-diatomic Hamiltonian, yielding molecular constants, including the value of the inversion splitting, , in the complexes. A semiquantitative model of the (moderate) quenching of the inversion splitting in the complex is proposed.