Branching Ratios of Cerium with the Kitt Peak 1m FTS

Abstract

The emission spectrum of cerium was recorded on the 1m Fourier transform spectrometer (FTS) at the National Solar Observatory, Kitt Peak, AZ., using a 140Ce electrodeless discharge lamp (EDL) as a source. The frequency range 4,000 to 27,600 cm-1 was covered in two runs while maintaining the EDL parameters as constant as possible. Large UV diodes were used as detectors for the 9,100 to 27,600 cm-1 range and In/Sb detectors were used for the 4,000 to 14,300 cm-1 range. The instrument was intensity calibrated for both ranges using standard lamp scans. A multiplication factor obtained from the overlap region was applied to bring the two regions to the same intensity scale.