Engineering topics
Publications and source records attributed to Williams, D..
An evacuated high-resolution Czerny-Turner spectrograph, which is described in this paper, has been used to determine the strengths S and self-broadening parameters for lines in the R branch of the nu (sub 3) fundamental of carbon dioxide at 298 and at 207 K. The values of self-broadening parameters at 207 K are greater than those to be expected on the basis of a fixed collision cross section.
The broadening of individual lines in the CO fundamental by various gases has been investigated. The results indicate that the ratio of the self-broadening ability of CO to the line-broadening ability of foreign gases is greater for lines in the band wings than for lines near the band center when the molecular mass of the broadener is less than that of CO. The results have been interpreted in terms of a phenomenological theory. Studies of the relative line broadening abilities of foreign gases have provided information that can be used to provide optical collision cross sections for individual lines in the CO fundamental.
Collisional broadening of IR absorption lines in vibration-rotation bands of carbon monoxide and hydrochloric acid
Collisional broadening of infrared absorption lines with application to planetary atmospheres
Nitric acid vapor in atmosphere as function of altitude from spectrograph, predicting downward diffusion
IR absorptance of CO below room temperature, determining strength and half widths of lines in R branch of fundamental band
Collision cross sections compared for line broadening in R branch of CO fundamental
Collisional line broadening ability of various foreign gases relative to nitrogen for rotational lines in fundamental absorption band of carbon monoxide
Infrared spectroscopy of gases used to simulate planetary atmospheres
Spectral transmittance of mixture of carbon monoxide and nitrous oxide for overlapping absorption bands
Computer under control of the flo-tran program automatically produces and updates flowcharts of fortran program source decks fed to it. The flowcharts are produced on either 35mm film or paper.