Abstract
The desorption yields of excited hydrogen atoms from the surfaces of KC1, KBr, NaCl, NaF and LiF have been measured as a function of incident photon and electron energy, time of irradiation, and sample temperature. The measurements indicate that the adsorption of hydrogen which leads to the stimulated emission of neutral, excited-state hydrogen is contingent upon surface damage induced by the incident radiation. Specifically, H2 adsorbs dissociatively at surface sites containing a non-stoichiometric excess of alkali metal. This hydrogen may come from the gas phase or from a source which has accumulated in the bulk of these compounds during the course of the experiment. Incident electrons or photons can then induce a valence excitation to a neutral, antibonding state of the surface alkali hydride molecule leading to the desorption of atomic hydrogen.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
