Knowledge Bank

Reproductions of $CO+$ spectra taken with this spectograph, recently modified for photographic recording of ultraviolet spectra, will be compared with spectra obtained earlier on a 3.4-m commercial Ebert spectrograph with a similar but smaller grating. The Czerny-Turner system will be used primarily for flash photolysis studies in the ultraviolet region, where the unusually large grating will provide a relatively fast instrument at resolutions usually limited by Doppler widths or natural line widths. The emission spectrum of $CO+,B\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}\Sigma +-X\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}\Sigma +$, has proved to be a convenient system for making comparisons of intensity and resolution of the two spectrographs, while at the same time providing additional data on the spin doubling constants of these two states. The current data have been analyzed taking full advantage of available microwave data for the ground state, thus permitting comparisons with previous results.