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Titolo:
Effect of dose rate, temperature and impurity content on the radiation damage in the electron irradiated NaCl crystals
Autore:
Dubinko, VI; Turkin, AA; Vainshtein, DI; den Hartog, HW;
Indirizzi:
Univ Groningen, Solid State Phys Lab, NL-9747 AG Groningen, Netherlands Univ Groningen Groningen Netherlands NL-9747 AG G Groningen, Netherlands Kharkov Phys & Technol Inst, UA-310108 Kharkov, Ukraine Kharkov Phys & Technol Inst Kharkov Ukraine UA-310108 8 Kharkov, Ukraine
Titolo Testata:
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
, volume: 166, anno: 2000,
pagine: 561 - 567
SICI:
0168-583X(200005)166:<561:EODRTA>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
ALKALI-HALIDES;
Keywords:
radiation damage; alkali halides; voids; bubbles; colloids;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
6
Recensione:
Indirizzi per estratti:
Indirizzo: den Hartog, HW Univ Groningen, Solid State Phys Lab, Nijenborgh 4, NL-9747AG Groningen, Netherlands Univ Groningen Nijenborgh 4 Groningen Netherlands NL-9747 AG
Citazione:
V.I. Dubinko et al., "Effect of dose rate, temperature and impurity content on the radiation damage in the electron irradiated NaCl crystals", NUCL INST B, 166, 2000, pp. 561-567

Abstract

The dependencies of void formation and radiolytic sodium accumulation on the irradiation dose, dose rate, temperature and impurity content are analyzed within a framework of a theoretical model, which is based on a new mechanism of dislocation climb. The mechanism involves the production of V-F centers (self-trapped hole neighboring a cation vacancy) as a result of the absorption of excess H centers at dislocation lines. Voids are shown to arisedue to the reaction between F and V-F centers at the surface of halogen bubbles. All reactions involved in the evolution of extended defects are controlled by the difference between the absorption of H centers and F centers. This difference is determined by the material specific parameters responsible for the bias factors of extended defects and by the mean concentration of point defects. The latter depends on the temperature and dose rate as described in the present paper. Impurities can facilitate or suppress radiation damage formation depending on their effect on the nucleation of extendeddefects under irradiation. This is demonstrated by comparing theoretical results obtained for dose dependence of colloid volume fraction at differentdislocation densities with experimental data obtained in crystals doped with different impurities. (C) 2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 16/07/20 alle ore 06:10:46