Total L-shell X-ray production cross sections by 400-700 keV proton impactfor elements with 34 <= Z <= 53

Total L-shell X-ray production cross sections induced by protons with energ ies between 400 and 700 keV were measured for elements with atomic number Z between 34 and 53. The ECPSSR theory describes appropriately the results. This model modifies the plane wave born approximation by considering projec tile energy lass (E), Coulomb deflection of the incoming ion (C), polarizat ion and change in electron binding energies through a perturbed stationary states method (PSS) and relativistic values of target electron mass (R). A comparison is given with previously published data for proton energies belo w 1 MeV and 26 less than or equal to Z less than or equal to 53, based on a scaling obtained from a reduced velocity parameter xi (R)(L). The results show that the scaling for these atomic numbers and energy ranges is adequat e and a semi-empirical expression to calculate those cross sections is prop osed. (C) 2001 Elsevier Science Ltd. All rights reserved.