Abstract
A non-destructive activation analysis of trace impurities in germanium giving rise to long-lived γ-emitting isotopes is described. Hg, Sn, Cr, Sb, Sc, Zn and Co were determined by γ-spectrometry after irradiation with thermal neutrons (φ th=10 l4n. cm -2.sec -1, irrad. time: 15 h, cooling period: ca. 30 days). The complex γ-spectrum was analysed by a combination of Covell's method and matrix calculus. The detection limits are approximately 2 p.p.b. of Hg, 7 p.p.b. of Cr, 200 p.p.b. of Sn, 1 p.p.b. of Sb, 10 p.p.b. of Zn, 0.2 p.p.b. of Co and 0.1 p.p.b. of Sc.
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