The ν₃ band of ¹⁴C¹⁶O₂ molecule measured by optical-frequency-comb-assisted cavity ring-down spectroscopy

Iacopo Galli (1) , Pablo Cancio Pastor (1) , Gianfranco Di Lonardo (2) , Luciano Fusina (2) , Giovanni Giusfredi (1) , Davide Mazzotti (1) , Filippo Tamassia (2) , Paolo de Natale (1)

1 INO - Istituto Nazionale di Ottica
2 Dipartimento di Chimica Fisica e Inorganica [Bologna]

The infrared spectrum of the rare isotopologue ¹⁴C¹⁶O₂ has been investigated in the range 2190-2250 cm^-1 with a frequency comb-referenced cavity ring-down spectrometer. Thirty-three ro-vibrational transitions of the ν₃ fundamental band have been detected. Their absolute frequency was measured with an relative uncertainty ranging from 7.1×10^-8 to 1.1×10^-8. The experimental frequencies were fitted to the conventional Hamiltonian of a linear molecule and a new set of spectroscopic parameters for the fundamental vibrational state has been improved for this species.

Mots clés: Physical Sciences

Domaines: Matière Condensée [cond-mat]

Iacopo Galli, Pablo Cancio Pastor, Gianfranco Di Lonardo, Luciano Fusina, Giovanni Giusfredi, et al.. The ν₃ band of ¹⁴C¹⁶O₂ molecule measured by optical-frequency-comb-assisted cavity ring-down spectroscopy. Molecular Physics, 2011, 109 (17-18), pp.2267-2272. ⟨10.1080/00268976.2011.614284⟩. ⟨hal-00742695⟩