LONG LIFETIME EMISSION OF THE EXCITED SPECIES EJECTED FROM THE SURFACE OF SOLID NE

Desorption of long-lived neutral particles from solid Ne is studied us ing selective photoexcitation and time of flight (TOF) techniques. The luminescence due to direct light from the sample surface is blocked b y rotating the sample. Two new prominent features are revealed in the TOF spectra measured with the special geometry in the study: a promine nt long tail and a maximum at the delay time of 0.5 ms. From the analy sis of the excitation spectra recorded by a time-window technique and the TOF spectra at selective excitation, it is considered that the new features are closely related to Ne-2 excimer desorption. An analysis of the probable mechanisms of long life-time emission is presented. ( C) 1997 Elsevier Science B.V.