Formation and stabilization of F centers following direct generation of self-trapped excitons in KCl crystals

被引：0

作者：

I. A. Kudryavtseva

E. A. Vasil’chenko

A. Ch. Lushchik

Ch. B. Lushchik

机构：

[1] Tartu University,Institute of Physics

来源：

Physics of the Solid State | 1999年 / 41卷

关键词：

Spectroscopy; State Physics; Direct Generation; Decay Channel; Irradiation Temperature;

D O I：

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学科分类号：

摘要：

The spectrum of luminescent F centers generated in high-purity KCl crystals by 7–10.2-eV photons has been measured at 230 K. The pulsed annealing of these centers (250–550 K), as well as the dependence of the efficiency of stable F-center generation on irradiation temperature (80–500 K) has been studied. The efficiencies of F− and Cl3−-center generation are maximum under direct optical creation of self-trapped excitons in the region of the Urbach intrinsicabsorption tail. Besides the exciton decay with formation of F centers and mobile H centers, a high-temperature exciton decay channel which involves creation of cation defects stabilizing the H centers has been revealed.

引用

页码：388 / 395

页数：7