K-shell x-ray production cross sections for 1.0-4.4-MeVαparticles on selected thin targets ofZ=22−34

$K$-shell x-ray production cross sections for 1.0-4.4 MeV $\alpha$ particles have been measured. The elements selected were Ti, V, Mn, Fe, Co, Ni, Cu, Zn, Ge, and Se, and all data were for thin targets evaporated onto thin carbon backings. The measured cross sections are compared with predictions of the plane-wave Born approximation (PWBA), the PWBA with binding-energy and trajectory corrections, and the binary-encounter approximation. It is found that the PWBA with both corrections fits the data best for all elements and energies considered.