Knowledge Bank

To date there is no reference to any work carried out ** XeH and only one band of ArH has been analyzed (1). Recently HeH and NeH have been studied (2) but none of the electronic states involved in the observed transitions for these molecules or for ArH have been assigned unambiguously. New emission spectra of ArH and XeH will be presented. These molecules were produced using a supersonic jet discharge (3) and a Penning ionization cell (4). The observed Rydberg-Rydberg transitions exhibit large A doubling and in some cases, the large l-uncoupling produces unusual rotational structure and branch intensities.