New Measurements on the Fourth Positive Bands of Carbon Monoxide

Abstract

New measurements of that part of the fourth positive band system of carbon monoxide between 2174A and 1280A have been made from plates photographed with a one-meter vacuum spectrograph. Low voltage arc excitation was used. The densities of the band edges were determined from a microphotometric trace. A few new band edges lying below the fourth positive system are reported. In general the measurements here reported are in good agreement with the wave-lengths published by Birge.