Thermal desorption of deuterium from polycrystalline nickel pre-implanted with helium

The thermal desorption technique has been used to study the trapping of deuterium atoms in high-purity polycrystalline nickel pre-implanted with helium from 1 × 1019 to 5 × 1020 ions/m2. The effect of post implantation annealing at 703 K and 923 K on the desorption behavior was investigated. Measured values of the total amount of detrapped deuterium (QT) and helium concentration were used in a computer simulation of the desorption curve. It was …