Surface effects on the radiation response of nanoporous Au foams

E.G. FU; M. CARO; E.M. BRINGA

APPLIED PHYSICS LETTERS

AMER INST PHYSICS

Lugar: New York; Año: 2012 vol. 101 p. 191607 - 191611

0003-6951

We report on an experimental and simulation campaign aimed at exploring the radiation response of nanoporous Au (np-Au) foams. We find different defect accumulation behavior by varying radiation dose-rate in ion-irradiated np-Au foams. Stacking fault tetrahedra (SFT’s) are formed when np-Au foams are irradiated at high dose-rate, but they are not formed in np-Au at low dose-rate irradiation. A model is proposed to explain the dose-rate dependent defect accumulation based on these results.