Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 11, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3103277
Keywords
hydrogen; isotope exchanges; self-diffusion; sodium compounds; thermal analysis; vacancies (crystal)
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Funding
- European Commission [MRTN-CT-2006-032474 (Hydrogen), MRTN-CT-2006-032474 (COSY)]
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We report on hydrogen-deuterium-exchange experiments on NaH probed by thermogravimetry. From the measurements a diffusion parameter of deuterium in NaH of D=1.1x10(-17) m(2)/s at 523 K is derived. The activation energy of tracer diffusion of D in NaH is found to be 1.0 eV. The results are hints for a diffusion process mediated by neutral hydrogen vacancies.
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