KβEmission Spectra of Argon and KCl. I

Measurements of the $K\beta$ region of argon gas, and potassium and chlorine in KCl are reported. These spectra were obtained in fluorescence and recorded by means of a vacuum, two-crystal spectrometer using calcite crystals. Under high-energy fluorescent excitation, the chlorine spectrum differs only slightly from that obtained under electron bombardment. Differences, if any, in the potassium spectrum are not apparent. The argon spectrum does not seem to have been previously examined with sufficient resolution and intensity linearity to allow such comparison. The spectra are discussed together in an attempt to clarify some of the problems associated with the chlorine valence emission band.