Abstract
L X-ray production cross sections for proton and 4He ion bombardment of thin targets of Ba, La and Ce have been measured in the energy range 0.25–1.80 MeV for protons and 0.40–1.80 MeV for helium ions. L-subshell ionization cross sections have been extracted and compared with the predictions of the perturbed stationary state theory including energy loss, Coulomb retardation and relativistic effects (ECPSSR). Particular attention has been devoted to the low incident energy region. The possible presence of second order effects (trajectory, vacancy rearrangement) in this region is discussed.
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