Udovic, T.
, Cook, J.
, Skripov, A.
, Hempelmann, R.
, Rempel, A.
and Gusev, A.
(2009),
Quasielastic neutron scattering study of hydrogen motion in NbC(0.71)H(0.28), Journal of Physics: Condensed Matter, [online], https://doi.org/10.1088/0953-8984/21/17/175410, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=960899
(Accessed December 2, 2025)
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Quasielastic neutron scattering study of hydrogen motion in NbC(0.71)H(0.28)
Published
Author(s)
, , Alexander Skripov, Reinhard Hempelmann, Andrey Rempel, Aleksandr Gusev
Abstract
In order to study the mechanism and parameters of H jump motion in the nonstoichiometric Nb carbides, we have performed quasielastic neutron scattering (QENS) measurements for NbC(0.71)H(0.28) over the temperature range 11- 475 K. Our results indicate that about 30% of H atoms in this system participate in a fast diffusive motion. The temperature dependence of the corresponding H jump rate in the range 298-475 K follows the Arrhenius law with an activation energy of 328 ± 9 meV. The Q dependence of the QENS data suggests that the observed jump motion corresponds to long-range diffusion of H atoms along chains of the off-centre sites in carbon vacancies.Citation
Journal of Physics: Condensed Matter
Volume
21
Issue
17
Pub Type
Journals
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Keywords
CARBOHYDRIDES, DIFFRACTION
Citation
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Created March 30, 2009, Updated September 17, 2025