Scientific Results

Radiocarbon measurements with mid-infrared SCAR spectroscopy

Year: 2017

Authors: Galli I., Bartalini S., Barucci M., Cancio P., Giusfredi G., Mazzotti D., Akikusa N., Romano L., D’Agostino F., Fedi M. E., Mandò P. A., De Natale P.

Autors Affiliation: Istituto Nazionale di Ottica (INO) – CNR, Via Carrara 1, 50019 Sesto Fiorentino FI, Italy; European Laboratory for Nonlinear Spectroscopy (LENS) Via Carrara 1, 50019 Sesto Fiorentino FI, Italy; ppqSense S.r.l., Via Gattinella 20, 50013 Campi Bisenzio FI, Italy; Development Bureau Laser Device R&D Group. Hamamatsu Photonics K.K. Shizuoka 434-8601 Japan; Istituto Nazionale di Fisica Nucleare (INFN)- Sez. di Firenze, Via Sansone 1, 50019 Sesto Fiorentino FI, Italy; Dipartimento di Fisica e Astronomia, Università di Firenze, Via Sansone 1, 50019 Sesto Fiorentino FI, Italy;
Dipartimento Istituto Italiano di Studi Orientali, Sapienza Università di Roma P.le Moro 5, 00185 Roma Italy

Abstract: Since its first invention and demonstration [1], saturated-absorption cavity ring-down spectroscopy (SCAR) of CO2 gas samples at 4.5 µm wavelength has been approaching accelerator mass spectrometry (AMS) precision in radiocarbon measurements. The first intercomparison between SCAR and AMS measurements was performed with modern (fermentation of brown cane sugar) and fossil (high-purity industrial gas cylinder) carbon dioxide samples [2]. These successful results have triggered further optimization of the data fitting procedure [3] and significant upgrades of the SCAR experimental apparatus, leading to an improved performance of the spectrometer in terms of precision and repeatability [4]. Recently, an independent research group has reproduced SCAR spectroscopy, assessing the working limits of this techniques in terms of saturation parameter with measurements on a different molecular species [5].

© 2017 IEEE

Conference title: 2017 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference (CLEO/Europe-EQEC 2107)

KeyWords: Radiocarbon; Cavity ring-down; Dioxide

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