Photoelectron spectroscopy of short-lived molecules using synchrotron radiation

In this paper, examples are given of recent measurements made at the Daresb ury Synchrotron Radiation Source on four short-lived diatomic molecules. Th e equipment designed to overcome the difficulties of interfacing reactive s pecies with the ultra-high vacuum environment of a synchrotron radiation so urce is described. The measurements presented have been selected to show th e advantage of using a continuum;source of radiation in identifying new str ucture in the photoionization continuum of these molecules.