Photon stimulated desorption of H+ from Si(100) and glass : a comparative study

Includes bibliographical references (pages [19]-20)Photon stimulated desorption (PSD) is a highly successful method for investigating the surface electronic properties of various substances. This work presents a comparative study between PSD from Si(100) and glass using synchrotron radiation. Catalytic oxidation of the Si(100) surface is achieved with sodium coverage. Ion yield for both substrates is studied as a function of alkali metal coverage and oxygen exposure, where the general lineshape of the spectra may vary. Both resonant and nonresonant desorption is found to occur by an Auger-assisted process with the observation of H+ at the Si(L[sub2,3]) and Na(L[sub2,3]) edges. For glass, the desorption spectra are shown to exhibit a series of resonances in the near-threshold region. Heat is shown to greatly influence the spectral lineshape of Si0[sub2] ion yield.M.S. (Master of Science