A new combined IRMS-AMS system for the measurement of small samples at CEDAD

Eugenia Braione, Lucio Maruccio, Gianluca Quarta, Lucio Calcagnile

Abstract

A new system dedicated to the measurement of samples with masses in µg range has been installed at CEDAD-(Centre for Dating and Diagnostics) - University of Salento. The set-up can perform 14C measurements by AMS (Accelerator Mass Spectrometry) on gaseous samples thanks to a new hybrid ion source, capable of accepting both solid and gas samples, simultaneously determining stable carbon and nitrogen isotopic ratio by IRMS (Isotopic Ratio Mass Spectrometer). An Elemental Analyzer (EA) combust organic samples and a gas splitting unit (GHI) split the combustion gases to the two instruments. The possibility to date samples with mass in the microgram range, significantly lower than that typically used for radiocarbon determinations (of the order of 0.5-1 mgC), has extended the experimental potential of CEDAD. The new experimental set-up has opened new frontiers for the application of AMS technique in several research fields. We present the performances of the system, the results of different tests performed on real samples and some preliminary results.

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DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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