Abstract
Time-of-flight (TOF) diagnostics have been applied to study the interaction of CO2 laser pulses with multilayers of D2O, CH3OH, CH3F, CCl4, and C6H5CHO condensed on different substrates (Ge, Ag, SiO2). Maxwellian TOF distributions were fitted to the measured distributions. The TOF temperatures and the desorption yields show the same spectral features as do the respective ir absorption spectra. This indicates resonant heating by wavelength-dependent excitation of internal modes of the condensed molecules. Semilog plots of the desorption yield versus reciprocal TOF temperature exhibit Arrhenius behavior, as expected for a thermally activated process.
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J. Heidberg, H. Stein, E. Riehl, I. Hussla: InSurface Studies with Lasers, ed. by F. R. Aussenegg, A. Leitner, M.E. Lippitsch, Springer Series Chem. Phys.33 (Springer, Berlin, Heidelberg 1983) pp. 226–229 and references therein
T.J. Chuang: Surf. Sci. Repts.3, 1–105 (1983)
B. Schäfer, P. Hess: Chem. Phys. Lett.105, 563–566 (1984)
D. Edwards, Jr.: Vacuum30, 189–192 (1980)
D. Lucas, G.E. Ewing: Chem. Phys.58, 385–393 (1981)
H.J. Kreuzer, D.N. Lowy: Chem. Phys. Lett.78, 50–53 (1981)
Z.W. Gortel, H.J. Kreuzer, P. Piercy, R. Teshima: Phys. Rev. B27, 5066–5083 (1983)
Z.W. Gortel, H.J. Kreuzer, P. Piercy, R. Teshima: Phys. Rev. B28, 2119–2124 (1983)
J.E. Bertie, E. Whalley: J. Chem. Phys.40, 1637–1645 (1964)
J. Heidberg, H. Stein, E. Riehl, A. Nestmann: Z. Phys. Chem. (Wiesbaden)121, 145–164 (1980)
M. Falk, E. Whalley: J. Chem. Phys.34, 1554–1568 (1961)
J.H.S. Green, D.J. Harrison: Spectrochimica Acta32A, 1265–1277 (1976)
R.E. Smith: Trans. Farad. Soc.36, 983–987 (1940)
R.A. Olstad, D.R. Olander: J. Appl. Phys.46, 1499–1508 (1975)
R.A. Olstad, D.R. Olander: J. Appl. Phys.46, 1509–1518 (1975)
J.P. Cowin, D.J. Auerbach, C. Becker, L. Wharton: Surf. Sci.78, 545–564 (1978)
T. Kawai, T. Sakata: Chem. Phys. Lett.69, 33–36 (1980)
B. Stritzker, A. Pospieszczyk, T.A. Tagle: Phys. Rev. Lett.47, 356–358 (1981)
A. Pospieszczyk, M.A. Harith, B. Stritzker: J. Appl. Phys.54, 3176–3182 (1983)
D. Burgess, Jr., R. Viswanathan, I. Hussla, P.C. Stair, E. Weitz: J. Chem. Phys.79, 5200–5202 (1983)
G. Wedler, H. Ruhmann: Surf. Sci.121, 464–486 (1982)
Z.W. Gortel, H.J. Kreuzer, M. Schäff, G. Wedler: Surf. Sci.134, 577–600 (1983)
B. Schäfer, M. Buck, P. Hess: Infrared Phys.25, 245–250 (1985)
M. Buck, B. Schäfer, P. Hess: To be published
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Schäfer, B., Hess, P. Time-of-flight diagnostics of wavelength-dependent CO2 laser-induced desorption from condensed layers. Appl. Phys. B 37, 197–204 (1985). https://doi.org/10.1007/BF00692941
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DOI: https://doi.org/10.1007/BF00692941