Results of recent tests of NEC AMS systems

Sundquist, M. L.; Loger, Roger; Daniel, R.E.; Kitchen, R.L.; Kolonko, J.; Klody, G.M.

doi:10.1063/1.59316

Cited by 3 publications

(1 citation statement)

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“…The need for a reliable 14 C AMS system that can measure low 14 C concentrations prompted us to select the proven technology of a National Electrostatics Corporation (NEC) 0.5MV compact sys-tem (Sundquist et al 1999;Suter et al 2000). The single-stage, 250-kV acceleration unit (Schroeder et al 2004) was also considered but later discarded as at the time there was no sufficient independent validation that it could provide the desired machine background level.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of the New AMS System at Accium BioSciences

et al. 2007

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ABSTRACT.A new compact accelerator mass spectrometry (AMS) system dedicated to the measurement of radiocarbon has been commissioned at the Accium BioSciences headquarters in Seattle. The entire facility (including ancillary laboratories for the preparation of graphite targets) has been designed to handle samples with a wide range of 14 C concentrations. In this paper, we discuss the technical details of the new facility and present performance test results demonstrating state-of-theart capabilities. In particular, modern samples can be readily measured with 0.3% precision and accuracy, machine background levels are consistently in the low 10 -16 ( 14 C/ 12 C), and chemical background is approximately equivalent to a fraction of modern of 0.004. In addition, when 100-times-modern samples were processed, no increase in background was observed, either during sample processing or during AMS measurement. This corresponds to a dynamic range for 14 C analysis of 6 orders of magnitude.

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Section: Introductionmentioning

confidence: 99%