Nuclear reaction analysis, using the 3He(d,p)4He reaction, was used to analyze the evolution of 3He profiles after ion implantations at 1 and 3MeV in two materials, monoclinic ZrO2 (as a test material) and Ca9Nd(PO4)5(SiO4)F1.5(OH)0.5 (britholite). Two data-processing methods were used: the classical excitation curve (proton yield versus deuteron energy) and the proton energy spectrum for a given deuteron energy. The characteristics of the 3He profiles (depth, width) obtained by both methods, during subsequent annealing, indicated that the He diffusion rate in the britholite could be described by:

D (cm2/s) = 2.5 x 10-4 exp[-1.07(eV)/kT]

at 200 to 400C, in agreement with previous results on similar materials.

D.Gosset, P.Trocellier, Y.Serruys: Journal of Nuclear Materials, 2002, 303[2-3], 115-24