Sound attenuation due to the decay of coherent concentration waves in a niobium-hydrogen solution
Melik-Shakhnazarov V. A., Naskidashvili I. A., Arabadzhyan N. L.
The attenuation peaks of low-frequency (~ 1 kHz) sound have been detected near the points of stability loss of a solid NbH0 04 solution relative to the formation of concentration waves. The diffusion coefficient of hydrogen D £ 10"11 cmVsec at Г~20 К has been estimated. Despite the high hydrogen concentration, this value is three to five orders of magnitude higher than those determined by using other methods.
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![](/ps/1517/article_23180_800_head.png "The attenuation peaks of low-frequency (~ 1 kHz) sound have been detected near the points of stability loss of a solid NbH<sub>0</sub> <sub>04</sub> solution relative to the formation of concentration waves. The diffusion coefficient of hydrogen <i>D </i>£ 10"<sup>11</sup> cmVsec at Г~20 К has been estimated. Despite the high hydrogen concentration, this value is three to five orders of magnitude higher than those determined by using other methods.")