[en] Annealed 50 μm thick nickel foils were heated in helium at pressures up to 3 kbar. After quenching to room temperature the helium content was measured by mass spectrometry. Most of the helium was dissolved in thin oxide layers on the specimen surfaces. After exposure to the highest pressures and temperatures the nickel matrix contained only about 10^-9 atomic parts of helium. It could not be established whether this was due to real solubility in the bulk or to oxidation, for example at the grain boundaries. The major part of the helium was released only when the specimens were heated to temperatures close to the melting point. (author)