Low Temperature Physics: 33, 523 (2007); https://doi.org/10.1063/1.2746243 (6 pages)
Fizika Nizkikh Temperatur: Volume 33, Number 6-7 (June 2007), p. 694-700    ( to contents , go back )

Stimulated by laser light exoelectron emission from solid Ar pre-irradiated by an electron beam

G.B. Gumenchuk1, A.N. Ponomaryov2, A.G. Belov1, E.V. Savchenko1, and V.E. Bondybey2,3

1B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine
E-mail: galina.gumenchuk@mytum.de

2Institut für Physikalische und Theoretische Chemie, TU München, 4 Lichtenberg Str., Garching 85747, Germany

3University of California, Irvine 92697, USA
pos Анотація:

Received November 20, 2006

Abstract

Spatially separated stable charge centers, self-trapped holes and trapped electrons, were generated in Ar cryocrystals by a low-energy electron beam. A combination of the cathodoluminescence (CL) and photon- stimulated exoelectron emission (PSEE) methods was used to monitor center formation and selected relaxation channel – exoelectron emission. It was found that photon-promoted electron current decreased exponentially under irradiation with the laser operating in the visible range. Influence of the laser parameters (power and wavelength) on the characteristic lifetime of exoelectron emission is discussed. Effective bleaching of the low-temperature peaks of thermally stimulated exoelectron emission by the laser light in a visible range was observed.

PACS: 72.20.Jv Charge carriers: generation, recombination, lifetime, and trapping;
PACS: 78.60.Kn Thermoluminescence;
PACS: 79.75.+g Exoelectron emission.

Key words: exoelectron emission, cryocrystals, optical spectroscopy.

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