ROTATIONALLY RESOLVED ION DIP SPECTROSCOPY OF NH3 (X)over-tilde ->(C)over-tilde'->(A)over-tilde TRANSITIONS

Ion dip spectroscopy, a folded OODR process with ion detection, has hitherto only been applied to the study of high lying vibrational levels of ground state polyatomics, We have succeeded in employing this technique to obtain rotationally resolved spectra of NH, (A) over tilde (1)A ''(2), a fast predissociating species. Conceivably, the method can be generalized to deal with a large number of other predissociating species.