Collision Broadening of Rotational Absorption Lines. IV. Pressure Broadening of the Ammonia Inversion Spectrum

1969 ◽  
Vol 50 (8) ◽  
pp. 3320-3329 ◽  
Author(s):  
Joseph S. Murphy ◽  
James E. Boggs
Keyword(s):  
Absorption Lines ◽  
Pressure Broadening ◽  
Collision Broadening

Interaction energy of water dimers from pressure broadening of near-IR absorption lines

2008 ◽  
Vol 462 (4-6) ◽  
pp. 188-191 ◽  
Author(s):  
Phyllis A.Y. Fiadzomor ◽  
Anthony M. Keen ◽  
Robert B. Grant ◽  
Andrew J. Orr-Ewing
Keyword(s):  
Interaction Energy ◽  
Absorption Lines ◽  
Ir Absorption ◽  
Pressure Broadening ◽  
Near Ir ◽  
Water Dimers

scholarly journals Collision Broadening in the Inversion Spectrum of Methyl Chloride at Pressures up to Two Atmospheres

1964 ◽  
Vol 17 (2) ◽  
pp. 175 ◽  
Author(s):  
CH Burton ◽  
WB Lasich ◽  
JH Noon ◽  
RW Parsons
Keyword(s):  
Absorption Coefficient ◽  
Methyl Chloride ◽  
Wave Number ◽  
Pressure Broadening ◽  
Power Absorption ◽  
Rotational States ◽  
Theoretical Predictions ◽  
Collision Broadening ◽  
Three Body

The power absorption coefficient a of microwaves of wave number v = 0� 333cm-1 by methyl chloride at 33� 7�C has been studied at pressures up to 2 atm, and the results are compared with theoretical predictions. Discrepancies which have previously been attributed to the effect of transitions between low.lying rotational states are shown to be due to three� body collisions. The collision diameter for pressure broadening of theinversion transition in methyl chloride is found to be 8�6 A; this is significantly larger an the figure of 7 . 2 A reported by earlier workerswho neglected the effect of three-body ollisions.

MEASUREMENT OF PRESSURE-BROADENING LINEWIDTHS OF NO FROM THE FITTING OF LMR SPECTRA WITH CORRECTIONS OF INSTRUMENTAL BROADENING

2000 ◽  
Vol 14 (11) ◽  
pp. 401-407 ◽  
Author(s):  
JIE-LI LIN ◽  
YU-YAN LIU ◽  
HONG-PING LIU ◽  
YUAN-QING QUO ◽  
XIAO-YONG LIU ◽  
...  
Keyword(s):  
Spectral Lines ◽  
Absorption Lines ◽  
Derivative Spectrum ◽  
Pressure Broadening ◽  
Fundamental Band ◽  
Band Spectra

For absorption lines, the distortion of spectral lines by experimental spectrometers must be considered in measuring linewidth which has been investigated by many authors. While in the derivative spectrum, we managed to give the corrections of instrumental broadening and distortion to obtain accurate linewidths. We developed a universal fitting program which was explored together with the method of correction in the fundamental band spectra of LMR of NO. The uncorrected halfwidths were compared with the corrected values, which were obtained from the program. The results of comparison are very satisfactory and demonstrate their useful application to analyze experimental spectra.

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