Abstract
A more or less routine method for the determination of up to 55 trace elements down to the ppb range is described. To obtain this, irradiation in a high thermal neutron flux, followed by Ge(Li) γ-spectrometry with large detectors and off-line computerized evaluation of the spectra, is necessary. To cover the range of halflives of the nuclides formed, spectrum measurements are carried out about one hour, one day, one week and one month after irradiation. Only in the case of highly active and rather long-living matrices is chemical separation of the matrix from all impurities necessary. The computer program is written in ALGOL-60.
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