Abstract
Beginning with rather basic principles, general relations are obtained for evaporative rate constants. These are established both as a function of energy and of temperature. In parallel with this, expressions are developed for the kinetic energy distribution of the separating species. Explicit evaluation of the rate constants in the case of “chemical” evaporation from an entity containingn monomeric units yields as a typical result
Experimental evidence in support of this relation is cited. Applications to thermionic emission are also noted.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Klots, C.E.: Z. Naturforsch.27a 553 (1972)
Klots, C.E.: J. Chem. Phys.64 4269 (1976)
Klots, C.E.: J. Chem. Phys.93 2513 (1990)
Kubo, R.: Statistical mechanics. p. 268. Amsterdam, New York: North Holland 1965
Stace, A.J., Lethbridge, P.G., Upham, J.E., Woodward, C.A.: J. Chem. Soc. Faraday Trans.86 2405 (1990)
Lifshitz, C., Louage, F.: J. Phys. Chem.93 5633 (1989)
Klots, C.E.: Acc. Chem. Res.21 16 (1988)
Weisskopf, V.: Phys. Rev.52 295 (1937)
Hultman, R., et al. (eds.): Selected values of the thermodynamic properties of the elements. Ohio: Am. Soc. Metals, Metals Park 1973
Raznjevic, K.: Handbook of thermodynamic tables and charts. Washington: Hemisphere Publishers 1976
Yaws, C.L.: Physical properties, New York: McGraw-Hill 1977
Trouton, F.: Philos. Mag.18 54 (1984)
Hildebrand, J.H.: J. Am. Chem. Soc.37 970 (1915); ibid40, 45 (1918)
Keesee, R.G., Castleman, A.W.: J. Phys. Chem. Ref. Data15 1011 (1986)
Jasper, J.J.: J. Phys. Chem. Ref. Data1 841 (1972)
Gspann, J., in: Datz, S. (ed.): Physics of electronic and atomic collisions. Amsterdam: North Holland 1982
Klots, C.E.: J. Phys. Chem.92 5864 (1988)
Klots, C.E.: Int. J. Mass Spectrom. Ion Phys.100 453 (1990)