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Title: Frequency-comb referenced spectroscopy of v₄₋ and v₅₋excited hot bands in the 1.5 and μm spectrum of C₂H₂

Journal Article · · Journal of Molecular Spectroscopy
 [1];  [2];  [3];  [1];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Stony Brook Univ., Stony Brook, NY (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., Stony Brook, NY (United States)
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Doppler-free transition frequencies for v₄₋ and v₅₋excited hot bands have been measured in the v₁ + v₃ band region of the spectrum of acetylene using saturation dip spectroscopy with an extended cavity diode laser referenced to a frequency comb. The frequency accuracy of the measured transitions, as judged from line shape model fits and comparison to known frequencies in the v₁ + v₃ band itself, is between 3 and 22 kHz. This is some three orders of magnitude improvement on the accuracy and precision of previous line position estimates that were derived from the analysis of high-resolution Fourier transform infrared absorption spectra. Comparison to transition frequencies computed from constants derived from published Fourier transform infrared spectra shows that some upper rotational energy levels suffer specific perturbations causing energy level shifts of up to several hundred MHz. These perturbations are due to energy levels of the same rotational quantum number derived from nearby vibrational levels that become degenerate at specific energies. Future identification of the perturbing levels will provide accurate relative energies of excited vibrational levels of acetylene in the 7100–7600 cm⁻¹ energy region.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00012704; AC02-98CH10886
OSTI ID:
1213380
Alternate ID(s):
OSTI ID: 1246442
Report Number(s):
BNL-108261-2015-JA; R&D Project: CO006; KC0301020; TRN: US1500645
Journal Information:
Journal of Molecular Spectroscopy, Vol. 361; ISSN 0022-2852
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

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Cited By (10)

Comb-locked Lamb-dip spectrometer journal June 2016
A well-isolated vibrational state of CO 2 verified by near-infrared saturated spectroscopy with kHz accuracy journal January 2020
Lamb-dips and Lamb-peaks in the saturation spectrum of HD journal January 2019
Comb-locked cavity ring-down saturation spectroscopy journal April 2017
Rovibrational laser control targeting a dark state in acetylene. Simulation in the N s = 1, N r = 5 polyad journal May 2018
Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser journal January 2018
Frequency measurements and self-broadening of sub-Doppler transitions in the v1 + v3 band of C 2 H 2 journal October 2018
Lamb dip CRDS of highly saturated transitions of water near 1.4 μ m journal February 2018
MARVEL analysis of the measured high-resolution rovibrational spectra of C2H2 text January 2017
Conjugating precision and acquisition time in a Doppler broadening regime by interleaved frequency-agile rapid-scanning cavity ring-down spectroscopy journal October 2017

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
acetylene
vibrational spectroscopy
energy levels
frequency comb
perturbations
sub-Doppler spectroscopy
Lamb dip