Self-broadening and self-shift in the $3{\nu }_2$ band of ammonia from mid-infrared-frequency-comb spectroscopy

Abstract

We report the broadband absorption spectrum of the $3{\nu }_2$ band of ${}^{14}$NH${}_3$ near 4 $\mu m$. The data were recorded using a mid-infrared frequency comb coupled to a homebuilt Fourier-transform spectrometer with a resolution of 0.00501 $c{m}^{-1}$. Line positions, line intensities, self-broadening, and self-shift parameters for six rovibrational lines were determined at room temperature ($T=296$ K). Comparison with HITRAN 2016 shows good agreement at improved precision. The high precision and the rapid tunability of our experiment enables advanced fast spectroscopy of molecular gases.

References in corpus (4)

• Mid-Infrared Frequency Comb Fourier Transform Spectrometer
• General variational approach to nuclear-quadrupole coupling in rovibrational spectra of polyatomic molecules
• Quadrupole Splittings in the near-infrared spectrum of ${}^{14}$NH${}_3$
• Re-evaluation of ortho-para-dependence of self-pressure broadening in the $v_1+v_3$ band of acetylene

Cited by in corpus (1)

• Near-to mid-IR spectral purity transfer with a tunable frequency comb: methanol frequency metrology over a record frequency span