Defects which were introduced by D bombardment were studied by using transmission electron microscopy. The resultant defects were perfect dislocation loops of interstitial type, with a Burgers vector of a/2<111>-type. The loop plane had non-integer Miller indices and was almost parallel to the (110) plane. The subsequent growth of some dislocation loops was observed during post-bombardment irradiation with 1MeV electrons in a high-voltage electron microscope. The growth was attributed to the dissociation of complexes of self-interstitial atoms with D, and the subsequent absorption of the released interstitial atoms by nearby dislocation loops.

TEM Study on Deuterium Irradiation-Induced Defects in Tungsten and Molybdenum. T.Matsui, S.Muto, T.Tanabe: Journal of Nuclear Materials, 2000, 283-287, 1139-43