Infrared spectroscopy of radiocarbon dioxide (14C16O2) has been the subject of a very few papers. The most recent systematic works on the n3 fundamental band were performed by Sams and De Voe in 1988 [1], and by Dobos et al. [2] in 1989. In Ref. [1], they measured twelve P and R-branch transitions by diode laser spectroscopy. The lines were assigned an uncertainty ranging between 0.001 and 0.005 cm-1. In Ref. [2] a medium resolution (0.18 cm-1) FTIR spectrum and a high-resolution diode laser spectrum were recorded. In the latter case, the precision estimated by the authors was better than 0.001 cm-1. Some of the papers published on this subject dealt with CO2 lasers [3], because the use of 14C16O2 can broaden the working range of spectrometers using CO2 lasers as source of radiation. However, this species is of particular interest for several other reasons. A spectroscopic study can provide physical information on a still poorly investigated isotopologue of CO2. This molecule is produced in nuclear power reactors and it is detected in order to monitor its environmental concentration. This is usually done through accelerated mass spectrometry (AMS). Labrie and Reid [4] showed that radiocarbon dating can be performed by infrared spectroscopy. Also, 14C measurements have been carried out on planetary atmospheres. Here we report on the high-resolution investigation of the fundamental n3 band of 14C16O2 by comb-referenced cavity ring-down spectroscopy. The main advantages of this technique are: high sensitivity (CO2 absorptions with line-strength as low as 5·10-32 cm can be detected), high resolution (1 kHz) and absolute frequency measurements, which in turn implies that no calibration of the spectra is needed.

The nu3 band of 14CO2 measured by frequency-referenced cavity ring-down spectroscopy.

TAMASSIA, FILIPPO;DI LONARDO, GIANFRANCO
2011

Abstract

Infrared spectroscopy of radiocarbon dioxide (14C16O2) has been the subject of a very few papers. The most recent systematic works on the n3 fundamental band were performed by Sams and De Voe in 1988 [1], and by Dobos et al. [2] in 1989. In Ref. [1], they measured twelve P and R-branch transitions by diode laser spectroscopy. The lines were assigned an uncertainty ranging between 0.001 and 0.005 cm-1. In Ref. [2] a medium resolution (0.18 cm-1) FTIR spectrum and a high-resolution diode laser spectrum were recorded. In the latter case, the precision estimated by the authors was better than 0.001 cm-1. Some of the papers published on this subject dealt with CO2 lasers [3], because the use of 14C16O2 can broaden the working range of spectrometers using CO2 lasers as source of radiation. However, this species is of particular interest for several other reasons. A spectroscopic study can provide physical information on a still poorly investigated isotopologue of CO2. This molecule is produced in nuclear power reactors and it is detected in order to monitor its environmental concentration. This is usually done through accelerated mass spectrometry (AMS). Labrie and Reid [4] showed that radiocarbon dating can be performed by infrared spectroscopy. Also, 14C measurements have been carried out on planetary atmospheres. Here we report on the high-resolution investigation of the fundamental n3 band of 14C16O2 by comb-referenced cavity ring-down spectroscopy. The main advantages of this technique are: high sensitivity (CO2 absorptions with line-strength as low as 5·10-32 cm can be detected), high resolution (1 kHz) and absolute frequency measurements, which in turn implies that no calibration of the spectra is needed.
2011
22nd Colloquium on High Resolution Molecular Spectroscopy. Université de Bourgogne. Dijon, France, August 29 - September 2 2011. Program and abstracts.
290
290
I. Galli; S. Bartalini; S. Borri; P. Cancio; G. Giusfredi; D. Mazzotti; P. De Natale; F. Tamassia; G. Di Lonardo.
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/108343
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact