The measurement of LEED intensities with a TV camera-computer system, which has been published in an earlier paper, is reported to be improved with respect to the speed of data collection by a factor of about 102. Other properties such as sensitivity, reliability and handling facility have also been improved. The new measuring mode, which applies a video tape recorder, allows the simultaneous measurement of all appearing diffraction spots down to a beam current of 10−11 A with a rate of 50 energy points/s. This pushes the total measuring time for LEED spectra to the order of seconds and makes possible to monitor non-stable surfaces. As an example intensity measurements for different adsorption stages of hydrogen on W(100) are presented.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
P.C.Stair, T.J.Kaminska, L.L.Kesmodel, G.A.Somorjai: Phys. Rev. B11, 623 (1975)
D.C.Frost, K.A.R.Mitchell, F.R.Shepherd, P.R.Watson: J. Vac. Sci. Technol.13, 1196 (1976)
K.A.R.Mitchell, F.R.Shepherd, P.R.Watson, D.C.Frost: Surf. Sci.64, 737 (1977)
P.Heilmann, E.Lang, K.Heinz, K.Müller: Appl. Phys.9, 247 (1976)
F.Jona: Surf. Sci.68, 204 (1977)
K.Ueda, F.Forstmann: Proc. 7th Intern. Vac. Congr.and 3rd Intern. Conf. Solid Sufaces (Vienna 1977) p. 2423
J.E.Demuth, T.N.Rhodin: Surf. Sci.42, 261 (1974)
About this article
Cite this article
Lang, E., Heilmann, P., Hanke, G. et al. Fast LEED intensity measurements with a video camera and a video tape recorder. Appl. Phys. 19, 287–293 (1979). https://doi.org/10.1007/BF00900472