With a two-crystal vacuum spectrometer, ionization curves of the $K{\alpha }_{3, 4}$ group of x-ray satellite lines have been recorded for elements S(16) to Ge(32). In the $K{\alpha }_{3, 4}$ satellite group are found five component lines for $16\le Z\le 28$ and four components for $29\le Z\le 32$. The wave-length position, relative intensity, and line width at half-maximum intensity of each satellite component has been measured. The widths and shapes of the $K{\alpha }_{1, 2}$ lines were determined and a brief discussion of these data is given.

• Received 6 May 1936

DOI:https://doi.org/10.1103/PhysRev.50.1