Precision and mass fractionation in 14C analysis with AMS

Abstract Modifications of the Utrecht AMS set-up have resulted in 14 C analysis with a routine 0.4% analytical precision and a detection limit of 2.0 × 10 −15 . In analysis with 10 Be, 26 Al and 36 Cl the precision is a few percent and the detection limit 10 −14 . Measurements on small carbon samples (