The partition of H into diffusible and residual parts was realized by pulse nuclear magnetic resonance spectroscopy, by gas chromatography and by prompt γ activation analysis. The total H content was determined by the 2 non nuclear magnetic resonance methods and the diffusible (mobile) component by CPMG nuclear magnetic resonance pulse sequence. Results on amorphous Ni(Cu)–Zr–H systems of different compositions were shown. Partially crystallized samples were also studied as an extension. A method proposed here gave the fractional population of H atoms in the free (mobile) state at the spin–spin relaxation time scale. On the other hand, the least values of the residual H content correlated surprisingly well with the numbers of filled four Zr-type H-sites calculated by Batalla et al. for 0.21nm exclusion distance.

Diffusible and Residual Hydrogen in Amorphous Ni(Cu)–Zr–H Alloys. K.Tompa, P.Bánki, M.Bokor, G.Lasanda, L.Vasáros: Journal of Alloys and Compounds, 2003, 350[1-2], 52-5