Defects on Ne-bubble surfaces in Mo

Traps for hydrogen, attributed to defects at the surface of high-atomic-density Ne precipitates in Mo produced by 5.6×${10}^{20}$, 9.4×${10}^{20}$, and 3.1×${10}^{21}$ 60-keV ${}_{}{}^{22}{}_{}{}^{}\mathrm{Ne}_{}^{+}{}_{}{}^{}$/${\mathrm{m}}^2$ have been studied in the temperature range 300–670 K by ion-beam techniques. A recovery stage was observed at 550 K equivalent to an activation energy of 1.5 eV, in good agreement with the known dissociation energy of hydrogen-vacancy complexes.