Non-destructive determination of trace elements in tungsten by helium-3 activation analysis

Abstract A non-destructive method is described for the determination of trace impurities at sub-p.p.m. levels in a tungsten matrix by 14-MeV 3 He activation analysis. A Ge(Li) spectrometer and a multichannel analyzer were used to determine V, Fe, Ni, Zn and Mo impurities. Interfering reactions are discussed in detail.