Scientific Results

Optical detection of radiocarbon dioxide: first results and AMS intercomparison

Year: 2013

Authors: Galli I., Bartalini S., Cancio P., De Natale P., Mazzotti D., Giusfredi G., Fedi M. E., Mandò P. A.

Autors Affiliation: Istituto Nazionale di Ottica (INO) – CNR
European Laboratory for Non-linear Spectroscopy (LENS)
Istituto Nazionale di Fisica Nucleare (INFN) – Sez. Firenze
Dipartimento di Fisica e Astronomia – Università di Firenze

Abstract: The first results of an optical method for measuring radiocarbon concentrations, based on mid-infrared laser spectroscopy of a carbon dioxide gas sample, are presented with the theoretical bases explained in detail. The first measurements on modern and highly enriched samples show the extreme linearity of this technique over more than 5 decades. An intercomparison with accelerator mass spectrometry (AMS) is performed both for modern and C-14-dead samples, assessing the almost perfect agreement of their respectively measured concentration values. The main features of our technique are compared with liquid scintillation counting (LSC) and AMS, and future developments of the current setup are discussed.

Journal/Review: RADIOCARBON

Volume: 55 (2-3)      Pages from: 213  to: 223

More Information: This work was financially supported by Regione Toscana through the projects CTOTUS, SIMPAS (for the position of I Galli within INO – CNR), and TEMART (for the position of M E Fedi within INFN) in the framework of POR-CReO/FESR 2007-2013, by Ente Cassa di Risparmio di Firenze, by CNR through the project Extreme Light Infrastructure, Italy (ELI-Italy) and by Laserlab-Europe consortium through the Joint Research Activity 2009-2012 JRA1:ALADIN.
KeyWords: AMS intercomparison; Cavity ring-down; Laser absorption spectroscopy; Optical detection; Radiocarbon dioxide; Concentration (composition); Optical method; Radionuclide, Arizona; United States
DOI: 10.1017/S0033822200057313

Citations: 25
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