Multiplication of electron excitations and the creation of stable radiation-induced defects in ionic crystals.

Autor: Lushchik, Ch., Vasil'chenko, E., Kudryavtseva, I., Kirm, M., Lushchik, A.
Zdroj: Russian Physics Journal; 1996, Vol. 39 Issue 11, p1029-1040, 12p
Abstrakt: The paper discusses the phenomenon of electron-excitation multiplication that arises when alkali halide crystals are exposed to 12-32 eV photons, with absorption of one photon followed at 8 K by the appearance of two or three electron excitations. Measurement of the spectrum of F-center generation by 6.5-32 eV photons showed that at 200-300 K, when vacancies and interstitials are mobile, the formation of stable defects is especially efficient when radiation creates a mixture of electron-hole pairs and excitons. Certain mechanisms of creation and stabilization of defects at various stages in electron-excitation multiplication are discussed. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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