| Abstract | The van der Waals complex NH₃-N₂ has been studied in the millimetre wave region, 76-106 GHz. Thirty-five lines were observed and assigned as pure rotational transitions, R(11) to R(15), belonging to six series involving all combinations of the parent molecule nuclear spin species, ortho/para-ammonia and ortho/para-nitrogen. Two of these series are continuations to higher J values of transitions observed previously in the microwave region, and the other four series were observed here for the first time. Predictions are given for a number of new NH₃-N₂ microwave transitions, and future observations of these should help to confirm the assignments given here. The time is ripe for theoretical investigations of NH₃-N₂ and the isoelectronic complex NH₃-CO. |
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