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Titolo:
Multispectrum analysis of self- and N-2-broadening, shifting and line mixing coefficients in the nu(6) band of (CH3D)-C-12
Autore:
Devi, VM; Benner, DC; Brown, LR; Smith, MAH; Rinsland, CP; Sams, RL; Sharpe, SW;
Indirizzi:
Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA Coll William & Mary Williamsburg VA USA 23187 Williamsburg, VA 23187 USA CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA CALTECH Pasadena CA USA 91109 LTECH, Jet Prop Lab, Pasadena, CA 91109 USA NASA, Langley Res Ctr, Hampton, VA 23691 USA NASA Hampton VA USA 23691NASA, Langley Res Ctr, Hampton, VA 23691 USA Battelle Mem Inst, Pacific NW Natl Labs, Richland, WA 99352 USA Battelle Mem Inst Richland WA USA 99352 Natl Labs, Richland, WA 99352 USA
Titolo Testata:
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
fascicolo: 2, volume: 72, anno: 2002,
pagine: 139 - 191
SICI:
0022-4073(20020115)72:2<139:MAOSAN>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIODE-LASER MEASUREMENTS; AIR-BROADENED WIDTH; 6-10 MU-M; TEMPERATURES RELEVANT; INFRARED-SPECTRUM; FITTING TECHNIQUE; CM(-1); INTENSITIES; (H2O)-O-16; ABSORPTION;
Keywords:
methane; monodeuterated methane; infrared spectra; Fourier transform infrared (FTIR) spectroscopy; spectral lineshape;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Benner, DC Coll William & Mary, Dept Phys, Box 8795, Williamsburg, VA 23187 USA Coll William & Mary Box 8795 Williamsburg VA USA 23187 3187 USA
Citazione:
V.M. Devi et al., "Multispectrum analysis of self- and N-2-broadening, shifting and line mixing coefficients in the nu(6) band of (CH3D)-C-12", J QUAN SPEC, 72(2), 2002, pp. 139-191

Abstract

A multispectrum nonlinear least-squares fitting technique has been appliedto determine accurate zero-pressure line center positions, Lorentz self- and N-2-broadening coefficients and self- and N-2-induced pressure shift coefficients of transitions in the nu (6) (E) perpendicular band of (CH3D)-C-12 between 1035 and 1270 cm(-1). Seventeen high-resolution (0.002-0.006 cm(-1)) room temperature absorption spectra recorded with two Fourier transformspectrometers (FTS) were analyzed together. Self-broadening coefficients for over 700 transitions and self-shift coefficients for more than 600 transitions were determined. Measurements of nitrogen-broadening coefficients for more than 480 transitions and nitrogen pressure induced shift coefficients for nearly 430 transitions were also made. The measurements include transitions with rotational quantum numbers as high as J " = 18 and K " = 15 andseveral forbidden transitions. The measurements were made in all six sub-bands (P-P, (P)Q, R-P, P-R, (R)Q and R-R). The measured self-broadening coefficients vary from 0.025-0.096 cm(-1) atm(-1) at 296 K and the N2-broadening coefficients from 0.02 to 0.08 cm(-1) atm(-1) at 296 K. Self-induced-shift coefficients range from -0.014 to +0.004 cm(-1) atm(-1) while the nitrogen-induced-shift coefficients vary from -0.013 to +0.008 cm(-1) atm(-1). Very few of the measured pressure-shift coefficients were positive, and the positive shift coefficients were mostly associated with the J " = K " transitions in the (P)Q sub-bands. The off-diagonal relaxation matrix element coefficients of a number of transitions with K " = 3 doublets for both self- and N-2-broadening were also obtained. The results obtained with the two different broadening gases are compared and discussed. Comparisons with previous values from the literature are also made. (C) 2001 Elsevier Science Ltd. All rights reserved.

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Documento generato il 28/03/20 alle ore 23:31:31