Millimeter-wave spectroscopy of the weakly bound molecular complex NH3-N2

The rotational spectrum of the van der Waals NH3-N2 complex is studied in the frequency range of 112–130 GHz. The transitions are measured in a cold molecular beam with an intracavity spectrometer based on an orotron. A total of six new transitions of different spin modifications of the complex are recorded. Molecular parameters of the K = 0 ground state are determined for the orthoNH3-orthoN2 modification.