HELIUM SOLUBILITY, DIFFUSION AND INTERACTION IN IONIC-CRYSTALS / KUPRYAZHKIN AY,KURKIN AU,SEMENOV OV,SCHEPETKIN AA // JOURNAL OF NUCLEAR MATERIALS. - 1994. - V. 208, l. 1-2. - P. 180-185.

ISSN/EISSN:

0022-3115 / нет данных

Type:

Article

Abstract:

Results on He solubility and diffusion and the influence of He on defect properties of CaF2, SrF2 and BaF2 are reported. A method of extracting the different-diffusion paths using thermodesorption data has been developed and high- and low-rate mechanisms of He transport in CaF2 have been observed. The interaction energy of He with crystals is - 0.4 eV for alkaline and - 0.5 eV for alkaline earth metal fluorides. The He interaction with fluoride ions is mainly repulsive. Low values of the dissolution energy are attributed to the attractive interaction of He with cations with interaction energies of - 0.5 eV for alkaline and - 0.7 eV for alkaline earth metals. Some data indicate strong He-induced stabilization of defects in CaF2 and changes in thermostimulated luminescence characteristics of He-doped crystals. He stimulates the structural conversion of the tetragonal lattice of zirconium hydrides into the cubic modification. The experimental results provide evidence for the chemical bonds formed by He in the crystals.

Author keywords:

нет данных

DOI:

10.1016/0022-3115(94)90209-7

Web of Science ID:

ISI:A1994MR11800019

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	JAN
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Research-Areas	Materials Science; Nuclear Science \& Technology
Web-of-Science-Categories	Materials Science, Multidisciplinary; Nuclear Science \& Technology
Number-of-Cited-References	17
Journal-ISO	J. Nucl. Mater.
Doc-Delivery-Number	MR118