Low-temperature diffusion, solubility, and interaction of helium in potassium bromide crystals with cation defects / Kupryazhkin AY,Dudorov AG,Zhiganov AN,Nekrasov KA // RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY. - 2001. - V. 75, l. 6. - P. 887-891.

ISSN/EISSN:

0036-0244 / нет данных

Type:

Article

Abstract:

The solubility and diffusion of helium in potassium bromide single crystals doped by calcium were studied by thermal desorption from crystals preliminarily saturated in the gas phase at temperatures 400-590 K and pressures up to 3.2 MPa. Three temperature regions of solubility are each described by the c = c(0)exp(-E-s/kT). Arrhenius dependence were observed for two samples with different calcium contents. The middle regions with anomalously low energies of solution (-1.0 and 0.8 +/- 0.1 eV) were proved to correspond to the solution of helium atoms in cationic vacancies formed in the dissociation of vacancy-impurity clusters. The results were substantiated by the experimental data on diffusion of helium in crystals and the results of computer simulation of the decomposition of clusters in the approximation of rigid ions combined with the shell model. Interaction between helium and crystals was shown to be chemical in character.

Author keywords:

нет данных

DOI:

нет данных

Web of Science ID:

ISI:000169300000005

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN
Publisher	INTERPERIODICA
Address	PO BOX 1831, BIRMINGHAM, AL 35201-1831 USA
Language	English
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Physical
ResearcherID-Numbers	Dudorov, Alexander/P-4773-2015
Number-of-Cited-References	16
Usage-Count-Last-180-days	4
Usage-Count-Since-2013	36
Journal-ISO	Russ. J. Phys. Chem.
Doc-Delivery-Number	442TA