title: Deep underground gamma spectrometric measurement of 26Al in meteorite samples.
abstract: 26Al is routinely measured in meteorite samples by accelerator mass spectrometry (AMS). PTB participates in an international intercomparison between laboratories using AMS and gamma-ray spectrometry to improve the quality of such measurements. We performed gamma spectrometric measurements at the underground laboratory UDO using the GESPECOR software to calculate corrections for efficiency transfer, self-attenuation and coincidence summing. Four meteorite samples were measured for more than 30 days each but nevertheless, the uncertainty budgets are dominated by the uncertainties of the count rates.
authors.affiliation: Physikalisch-Technische Bundesanstalt, Braunschweig, Germany. dirk.arnold@ptb.de
authors.forename: Dirk
authors.initials: D
authors.lastname: Arnold
authors.forename: Stefan
authors.initials: S
authors.lastname: Neumaier
authors.forename: Octavian
authors.initials: O
authors.lastname: Sima