Frequency-comb-assisted absolute calibration and linestrength of H12C13CH ro-vibrational transitions in the 2v3 band

Year: 2018

Authors: Di Sarno V., De Natale P., Tasseva J., Santamaria L., Cané E., Tamassia F., Maddaloni P.

Autors Affiliation: INO, CNR, Via Campi Flegrei 34, I-80078 Pozzuoli, Italy; Ist Nazl Fis Nucl, Sez Napoli, Complesso Univ MS Angelo,Via Cintia, I-80126 Naples, Italy; Ist Nazl Fis Nucl, Sez Firenze, Via G Sansone 1, I-50019 Sesto Fiorentino, Italy; ASI, I-75100 Matera, Italy; Univ Bologna, Dipartimento Chim Ind Toso Montanari, Viale Risorgimento 4, I-40136 Bologna, Italy.

Abstract: We report on a precision spectroscopic study of room-temperature (HCCH)-C-12-C-13 in the 6463-6520 cm(-1) range, using a continuous-wave diode laser phase-locked to a near-infrared optical frequency comb synthesizer stabilized, in turn, against a GPS-disciplined rubidium clock. By tuning the comb repetition frequency, several ro-vibrational transitions in the P and R branches of the 2v(3) overtone band are recorded. Accuracy levels as low as 100 kHz, 5.10(-10) in fractional terms, are obtained in the determination of absolute line-center frequencies. In addition, line intensities are measured for the first time, with a best fractional uncertainty of 1%, and used to retrieve the purely vibrational transition dipole moment in conjunction with the first-order Herman-Wallis factor. Finally, the pressure broadening coefficients gamma(self) are also derived for the studied transitions. (C) 2017 Elsevier Ltd. All rights reserved.

Journal/Review: JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER

Volume: 206      Pages from: 31  to: 35

KeyWords: 2v3 Infrared band; Absolute frequency metrology; H12C13CH; Infrared devices; Spectroscopic analysis, Absolute frequency; H^12C^13CH; Infrared bands; Linestrength; Ro-vibrational spectroscopies, Laser mode locking, calibration; carbon isotope; hydrogen isotope; precision; spectroscopy; vibration
DOI: 10.1016/j.jqsrt.2017.10.030

Citations: 1
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