Author/Authors :
Miro، نويسنده , , S. and Studer، نويسنده , , F. and Costantini، نويسنده , , J.-M. and Berger، نويسنده , , P. and Haussy، نويسنده , , J. and Trouslard، نويسنده , , P. and Grob، نويسنده , , J.-J.، نويسنده ,
Abstract :
In the context of nuclear waste storage, the knowledge of the effect of irradiation on the diffusion of helium produced by α-decays in apatites is an important issue. The analysis of implanted 3He diffusion for two compositions was carried out with the 3He(d,p)4He nuclear reaction by using a deuteron milli- or micro-beam. Upon 163-MeV Au-ion irradiation, a significant fraction of 3He atoms migrated towards the surface below which they were trapped, whereas a proportion of 3He atoms remained trapped in the end-of-range region. Moreover, a clear helium loss was determined. These radiation-induced migration effects are enhanced in Ca10(PO4)6F2 compared with the Ca4Nd6(SiO4)6F2.
