[en] Thermal release behavior of helium implanted into silver with 20 keV He⁺ ions to fluences ranging from 5x10²⁰ to 5x10²¹ ions/m² has been studied. The number of release peaks increased and the initiating temperature for helium release became lower with increasing fluence. Above a fluence of 1.5x10²¹ ions/m², a significant release peak was observed around 550deg C independently of fluence. It was ascertained that the activation energy for helium release in this peak was equivalent to that for the silver self-diffusion. The helium releasing mechanism was discussed, comparing the results for silver to those for copper and nickel. (orig.)