Isotopic effect at oxygen diffusion in imperfect crystals of cerium oxide / Kovalenko M. A.,Kupryazhkin A. Ya. // TECHNICAL PHYSICS. - 2015. - V. 60, l. 2. - P. 155-161.

ISSN/EISSN:

1063-7842 / 1090-6525

Type:

Article

Abstract:

The surface and volume diffusion of oxygen isotopes in different phase states of Ce1 - x Gd (x) O2 - x/2 crystals are studied with the high-speed molecular dynamics method (using graphics processors). It is shown that the ratio between the oxygen isotope diffusion coefficients (the so-called isotopic effect) in the volume of simulated crystals, D(O-16)/D(O-18) a parts per thousand 1.05, agrees well with the well-known ratio and does not depend on the temperature, phase state, and particle-particle interaction potential. On the surface of nanocrystals, the isotopic effect is a linear function of temperature. The ratio between diffusion coefficients of light and heavy isotopes grows with decreasing temperature and equals D(O-16)/D(O-18) a parts per thousand 1.12 at T = 1000 K.

Author keywords:

NANOCRYSTALS MOLECULAR-DYNAMICS; DOPED CERIA

DOI:

10.1134/S1063784215020127

Web of Science ID:

ISI:000350574000001

Соавторы в МНС:

Другие поля

Поле	Значение
Month	FEB
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1090-6525
Keywords-Plus	NANOCRYSTALS MOLECULAR-DYNAMICS; DOPED CERIA
Research-Areas	Physics
Web-of-Science-Categories	Physics, Applied
Author-Email	akm\_max@mail.ru
Number-of-Cited-References	8
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	12
Journal-ISO	Tech. Phys.
Doc-Delivery-Number	CC7UN