Abstract
Since early 1982, a substantial upgrading of the Simon Fraser University radioisotope dating system at the McMaster FN accelerator has taken place. The accelerator itself was equipped with a new charging system and beam tubes, resulting in excellent stability and beam transmission. A new isotope filtering system of two magnets and a Wien filter has removed previously troublesome backgrounds: our carbon background from graphite is now ∼ 47 ka BP, and is due to real 14C rather than scattered 13C. Measurement of 10Be in natural samples is now routine, with several hundred samples processed. Other work on 10Be has included studies which showed for the first time that 10Be could be measured at low energies (3 MV). We have also started work on 26Al detection as a preliminary to the investigation of 26Al/ 10Be dating. Finally, we present examples of our applications of this facility to studies in oceanography and archaeology.
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