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 less than that in W 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.

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