Surface processes on KBr single crystals examined by thermostimulated exo-electron emission and desorption

0553873 - FZÚ 2022 RIV NL eng J - Journal Article
Pokorný, Petr - Novotný, Michal - Dekhtyar, Y. - Lushchik, A. - Hruška, Petr - Fara, Jan - Fitl, Přemysl - Musil, Jindřich - Jaaniso, R. - Lančok, Ján
Surface processes on KBr single crystals examined by thermostimulated exo-electron emission and desorption.
Optical Materials. Roč. 114, April (2021), č. článku 110898. ISSN 0925-3467. E-ISSN 1873-1252
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR GA18-17834S
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760; AV ČR(CZ) LZA-19-01; AV ČR(CZ) EST-18-01
Program: Bilaterální spolupráce; Bilaterální spolupráce
Institutional support: RVO:68378271
Keywords : thermostimulated exo-electron emission * desorption * UV irradiation * low temperature * KBr
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.754, year: 2021
Method of publishing: Limited access
https://doi.org/10.1016/j.optmat.2021.110898

Potassium bromide (KBr) is a material with many potential uses in various branches of physics and technology (in scintillators, for a Fourier spectrometer, electro-optical elements such as IR laser windows, sensors and optical fibers). We conducted a series of combined measurements of thermally stimulated exo-electron emission (TSEE)and thermally stimulated desorption (TSD). At low doses of UV irradiation, the most prominent process is the combined emission of negative charges with desorption of the components of O, H2O and mainly K, KOH and Br,as described below. At higher irradiation doses, the KBr F-center plays the most important role (Tm = 160 ◦C) and at temperatures above +200 ◦C also the decomposition of chemically bonded atoms and other components occurs. This process is accompanied by the corresponding emission of electrons and at the same time some of the already chemically bonded structures such as HBr3 are released.
Permanent Link: http://hdl.handle.net/11104/0328557