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Defects generated by x radiation in KCl crystals (in Russian)

Journal Article · · Ukr. Fiz. Zh. (Russ. Ed.), v. 18, no. 7, pp. 1069-1074
OSTI ID:4392223
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A complex study of defect properties was performed in KCl crystals. Mutual transformation of V/sub 3/ in equilibrium V/sub F/ centers is shown. It is established that at temperatures close to room, one F band in the spectrum of roentgenized crystals is completely decolored by light, and the hole V/sub 3/- band is slightly changed. In crystals with decolored F band, there appear three thermoluminescence peaks (413 441, 500 deg K) instead of one (453 deg K) in the The spectrum consists of seven lines. It follows from the spectrum angular dependence that the paramagnetic center symmetry axis coincides with the crystal directions STA110!. On the basis of the data on EPR and thermoluminescence of KCl crystals roentgenized at room temperature, the conclusion is drawn that decoloration of F band results from displacement of F centers and their joining with the interstitial ions of the alkali, haloid, and neutral pairs. Appearance of these defects follows from the character of F and V3 centers accumulation and the law of crystal electroneutrality. The paramagnetic center model is suggested representing a neutral interstitial atom of potassium, paramagnetic electron of which is also localized on the chlorine ion nucleus, and haloid vacancy which are arranged in the direction STA110! of the crystal. 6 figures. (auth)
Research Organization:
Kiev Polytechnical Inst.
NSA Number:
NSA-29-001038
OSTI ID:
4392223
Journal Information:
Ukr. Fiz. Zh. (Russ. Ed.), v. 18, no. 7, pp. 1069-1074, Journal Name: Ukr. Fiz. Zh. (Russ. Ed.), v. 18, no. 7, pp. 1069-1074; ISSN UFIZA
Country of Publication:
Country unknown/Code not available
Language:
Russian

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Related Subjects

*POTASSIUM CHLORIDES-- PHYSICAL RADIATION EFFECTS
BLEACHING
CRYSTALS
ELECTRON SPIN RESONANCE
F CENTERS
HOLES
INTERSTITIALS
N50340* --Metals
Ceramics
& Other Materials--Plastics & Other Materials--Radiation Effects
PHOTON BEAMS
SPECTRA
THERMOLUMINESCENCE
V CENTERS
VISIBLE RADIATION
X RADIATION