Frequency Comb-referenced Measurements of Self- and Nitrogen-broadening in the m1 + m3 Band of Acetylene
We report measurements of self- and nitrogen-pressure broadening of the P(11) line in the ?{sub 1} + ?{sub 3} combination band of acetylene at 195 739.649 5135(80) GHz by absorption of radiation emitted by an extended cavity diode laser referenced to a femtosecond frequency comb. Broadening, shift and narrowing parameters were determined at 296 K. For the most appropriate, hard collision, model in units of cm{sup -1}/atm, we find 0.146317(27), 0.047271(104) and -0.0070819(22) for the acetylene self-broadening, narrowing and shift, and 0.081129(35), 0.022940(74) and -0.0088913(25) respectively, for the nitrogen-broadening parameters. The uncertainties are expressed as one standard deviation (in parenthesis) in units of the last digit reported. These parameters are 2-3 orders of magnitude more precise than those reported in previous measurements. Similar analyses of the experimental data using soft collision and simple Voigt lineshape models were made for comparison.
- Research Organization:
- BROOKHAVEN NATIONAL LABORATORY (BNL)
- Sponsoring Organization:
- DOE - OFFICE OF SCIENCE
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 1019510
- Report Number(s):
- BNL--95220-2011-JA; KC0301020
- Journal Information:
- Journal of Molecular Spectroscopy, Journal Name: Journal of Molecular Spectroscopy Journal Issue: 1 Vol. 266; ISSN 0022-2852
- Country of Publication:
- United States
- Language:
- English
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