Nonradiative transition to the ground state and superelastic scattering of exited atoms upon impact on the surface of wide-bandgap dielectrics View Full Text


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Article Info

DATE

2005-05

AUTHORS

A. M. Bonch-Bruevich, T. A. Vartanyan, S. G. Przhibel’skii, V. N. Smirnov, V. V. Khromov

ABSTRACT

The impact of excited cesium atoms on sapphire and glass surfaces have been experimentally studied. It is established that the probability of electron excitation quenching upon impact of an atom on the dielectric surface is close to unity. The velocity distribution of unexcited atoms upon scattering from the surface has been determined using the time-of-flight technique. The kinetic energies of most of these atoms are several tens of times greater than the energy of thermal motion of the excited atoms impinging on the surface. Conversion of the internal energy of atoms into their kinetic energy is explained in terms of nonradiative electron transitions with simultaneous excitation of lattice vibrations in the dielectric crystal. This mechanism of atomic excitation quenching near the dielectric surface explains the significant difference between the energies of atoms upon superelastic scattering and upon photodesorption from an adsorbed state. More... »

PAGES

998-1004

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/1.1947324

DOI

http://dx.doi.org/10.1134/1.1947324

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1004199672


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