We have measured the room temperature N2 and O2 pressure-broadening coefficients for the 2.4978-THz 132,12 ← 121,11J = 27/2 ← 25/2 line of HO2 consisting of two unresolved hyperfine components. The measurements were made at the European Laboratory for Nonlinear Spectroscopy in Florence. Italy, using a tunable far-infrared spectrometer (TuFIR). based on the mixing of radiation from two CO2 lasers and a microwave synthesizer on a metal-insulator-metal (MIM) diode. The pressure-broadening results obtained, and their 1σ uncertainties, are αN2 = 47.4 ± 4.4 kHz/Pa (6.3 ± 0.6 MHz/Torr) and αO2 = 19.9 ± 1.6 kHz/Pa (2.7 ± 0.2 MHz/Torr); this corresponds to αair = 41.6 ± 3.8 kHz/Pa (5.6 ± 0.5 MHz/Torr).
Pressure Broadening of the 2.4978-THz Rotational Lines of HO2 by N2 and O2 / K. Chance;P. Denatale;M. Bellini;M. Inguscio;G. Dilonardo;L. Fusina. - In: JOURNAL OF MOLECULAR SPECTROSCOPY. - ISSN 0022-2852. - STAMPA. - 163:(1994), pp. 67-70. [10.1006/jmsp.1994.1007]
Pressure Broadening of the 2.4978-THz Rotational Lines of HO2 by N2 and O2
INGUSCIO, MASSIMO;
1994
Abstract
We have measured the room temperature N2 and O2 pressure-broadening coefficients for the 2.4978-THz 132,12 ← 121,11J = 27/2 ← 25/2 line of HO2 consisting of two unresolved hyperfine components. The measurements were made at the European Laboratory for Nonlinear Spectroscopy in Florence. Italy, using a tunable far-infrared spectrometer (TuFIR). based on the mixing of radiation from two CO2 lasers and a microwave synthesizer on a metal-insulator-metal (MIM) diode. The pressure-broadening results obtained, and their 1σ uncertainties, are αN2 = 47.4 ± 4.4 kHz/Pa (6.3 ± 0.6 MHz/Torr) and αO2 = 19.9 ± 1.6 kHz/Pa (2.7 ± 0.2 MHz/Torr); this corresponds to αair = 41.6 ± 3.8 kHz/Pa (5.6 ± 0.5 MHz/Torr).
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