Research Papers in Physics and Astronomy


Date of this Version

May 1990


Published in the Journal of Vacuum Science and Technology A 8 (3), May/Jun 1990. Copyright © 1990 American Vacuum Society. Used by permission. For free online abstracts, see


We have investigated the desorption of N2 from Ni(100) using thermal desorption spectroscopy (TDS). A modified Polanyi-Wigner equation has been used to obtain the desorption energy and the preexponential factor, both of which depend on the coverage of the adsorbate. We show that there is a large lateral interaction among the adlayer molecules when N2 goes down as ordered c (2 X 2) on Ni. In addition, the overlayer ordering, in the thermal desorption process, is observed to affect the thermal desorption spectra.

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