The trapping of D atoms which had been implanted into single crystals was investigated. The amount of retained D near to the surface layers of the crystals was higher than that in Mo crystals at 300 to 650K. Depth profile studies of the retained D atoms and defects indicated that the trapping of D atoms was associated with lattice distortions due to implantation-induced extended defects such as interstitial loops. The D atoms which were implanted into the crystals were located near to tetrahedral interstitial sites in both the implanted surface layer, and at depths where few displacements were expected to be created by collisions.

Deuterium Retention in Tungsten and Molybdenum. S.Nagata, K.Takahiro: Journal of Nuclear Materials, 2000, 283-287, 1038-42