The Infra-Red Spectrum and Molecular Constants ofC12O16and

Abstract

The infra-red spectrum of carbon monoxide has been investigated with a 7200 line-per-inch grating. The fundamental bands of C 12 0 16 and C 13 0 16 and the overtone of C 12 0 16 were measured. The rotational structure has been analyzed by means of combination relations, and the following new values of the molecular constants have been obtained: co e = 2169.60 cm -1 , to/ = 2121.33 cm" 1 , x e o>e=13.22 cm" 1 , (*«««)'= 12.64 cm" 1 , J5 a = 1.9238 cm" 1 , 3,' = 1.8465 cm" 1 , <* = 0.0175 cm" 1 , «'= 0.0169 cm" 1 , /«= 14.548 XlO" 40 g cm 2 , // = 15.157X10" 40 g cm 2 , r e (average for both molecules) = 1.1291 XlO" 8 cm. The primed constants refer to the isotopic molecule.

Flame spectrum of acetylene from 1 to 5 microns

“…A possible interpretation of this structure, on L he basis of the magnitude of the separation of the components and the probable presence of intermediate combustion products, is thaL it originates in CO, specifically the long wavelength por-Lion of the negative branch of the ] -70 band. By comparing the wavelengths of the emission peaks with the absorption data of LagemaIUl, N ielsen and Dickey [4], it is fmind that seven, or rough ly half of the measured maxima in the interval where reported data permit comparison, agree within experimental error with the absorption lines reported by those authors. This comparison is shown in table 2, which lists the positions of all maxima observed in this work.…”

“…with high r esolution by Lagemann, Nielsen, and Dickey [4]. It should consist of P and R branches, but the P branch of this CO band is overlapped by the R branch of the Va vibrational band of H 20 at 2.5 J1-, which makes it impossible to observe its real profile.…”

The band spectrum of carbon monoxide

“…Fine structure of the fundamental and overtone bands was first resolved b} r Whitcomb and Lagemann [272], and for the isotopic fundamental (C 13 0 16 ) by Lagemann et al, [139]. Mills and Thompson [162] Plyler et al [193], in addition to 1-0, measured some lines of the 2-1 band of these isotopes.…”

Development of a radiochemical method for analyzing radon gas in uranium mine atmospheres: covering the period February 3, 1975--March 31, 1976

“…This deposited in the bottom of the U-tube and dissolved very rapidly when the tube was rinsed with water. Bands of COF 2 , 72 » 73 CO, 7 "** 75 and C0 2 , 76 were observed in infrared spectra of the gas samples. COF 2 and C0 2 were quantitatively removed from the effluent gas by a 10 g bed of soda-lime.…”