K-shell photoelectric cross sections for intermediateZelements at 37 and 74 keV

Abstract
K-shell photoelectric cross-section measurements at 36.818 and 74.409 keV, in 15 elements in the range 33Z74, have been made using Sood's method with minor modifications which are necessitated because of the nonavailability of clean and strong sources of low-energy photons. No discrepancy between theory and experiment similar to the one reported for the L-shell case has been found.