Microwave spectroscopy of the weakly bound CO-ortho-D2 molecular complex

Abstract

A van der Waals complex that consists of a deuterium molecule in the ortho state and a carbon monoxide molecule, CO-ortho-D2, was studied in the frequency range 85–130 GHz with the help of an intracavity orotron-based spectrometer. Nine new lines, which correspond to rotational transitions and belong to the R and Q branches, were measured and identified. The positions of the rotational energy levels of CO-ortho-D2 were refined by comparative analysis of the transition frequencies measured in this work and previously reported microwave and infrared data.