Issues

 / 

1977

 / 

June

  

Reviews of topical problems


Decay of electronic excitations into radiation defects in ionic crystals

This article reviews the fundamental experimental and theoretical results on the nature of radiation defects and the mechanism of their production in ionic (mainly alkali-halide) crystals. We show that one can produce high concentrations of radiation defects in these crystals by irradiating with photons and particles whose energies do not suffice to displace atoms from lattice sites in elastic collisions with them. On the other hand, excitons and band holes in these crystals have a tendency to autolocalize in the regular lattice. In certain electronic states, excitons prove to be unstable with respect to decay into Frenkel' defects. This is the reason for the low radiation stability of many ionic crystals. We discuss the mechanisms of the above-cited instability and of secondary processes (localization, recombination, charge transfer) in which the products of exciton decay participate, as well as a possible role of such processes in other types of solids.

Fulltext pdf (939 KB)
Fulltext is also available at DOI: 10.1070/PU1977v020n06ABEH005405
PACS: 61.70.Rj, 71.55.−i
DOI: 10.1070/PU1977v020n06ABEH005405
URL: https://ufn.ru/en/articles/1977/6/b/
Citation: Lushchik Ch B, Vitol I K, Élango M A "Decay of electronic excitations into radiation defects in ionic crystals" Sov. Phys. Usp. 20 489–505 (1977)
BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks

Оригинал: Лущик Ч Б, Витол И К, Эланго М А «Распад электронных возбуждений на радиационные дефекты в ионных кристаллах» УФН 122 223–251 (1977); DOI: 10.3367/UFNr.0122.197706b.0223

© 1918–2024 Uspekhi Fizicheskikh Nauk
Email: ufn@ufn.ru Editorial office contacts About the journal Terms and conditions