PHYSICAL REVIEW A, cilt.61, sa.4, 2000 (SCI-Expanded)
A method was developed for the accurate measurement of cross sections. This method involves the measurement of a differential incoherent cross section in terms of the K-shell cross section in the target, such that source strength, source-target, and target-detector solid angle terms cancel out in the final expression used to evaluate the differential incoherent scattering cross section. Differential cross sections for incoherent scattering of 59.54-keV gamma rays by Zr, Nb, and Mo have been measured for angles ranging from 40 degrees to 135 degrees using a high-resolution Si(Li) detector. The experimental values have been compared with those estimated on the basis of the nonrelativistic Hartree-Fock wave functions.