Irradiation Effects in Cu, Ag, and Au Near 10°K

Electrical resistivity increases produced by 12-Mev deuteron irradiation were measured as a function of integrated deuteron flux in Cu, Ag, and Au. The bombardment temperature was near 10°K and no thermal recovery of the irradiation effects was observed; however, evidence that appreciable radiation annealing occurred during the bombardment was found. The resistivity increases near 10°K were much larger than those previously obtained in these metals for equal irradiations made near liquid nitrogen temperature. The observed $Z$-dependence of the irradiation effects agreed closely with that predicted by Seitz's theory.