Experimental detection of HOC/+/ by microwave spectroscopy

Physics

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62

Interstellar Matter, Microwave Spectra, Molecular Ions, Carbon 13, Chemical Bonds, Configuration Interaction, Doppler Effect, Hydrogen Ions, Interstellar Chemistry, Isomers, Metastable State, Oxygen 18, Self Consistent Fields

Scientific paper

A definitive spectroscopic observation of HOC(+) is reported. The region from 88,200 to 89,800 MHz was searched and four lines of HCO(+) were found, one of which is discussed here. A statistically significant Doppler shift was not measurable for this weak line, but a pressure-broadening parameter was found and it was determined that the line contained no nitrogen. Isotopic mixing showed the line to come from molecules containing one H, one C, and one O atom. The ion line was readily observed and final frequencies were measured. Principal axis coordinates were calculated for all three atoms. The microwave frequencies and gamma-sub-s structures were in essentially perfect harmony with theoretical predictions, confirming the assignment of these spectra beyond any reasonable doubt.

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