L x-ray production cross-sections of tungsten Y Si-ion impact

The production cross sections of Ll ,Lα, Lβ and Lγ lines for a thin tungsten target have been measured with Si-ions of 70, 91 and 98 MeV (q=6+ and 8+). These calculated cross sections have been compared with the theoretical values based on ECPSSR, PWBA and MECPSSR theories. The PWBA theory has been found to overestimate the experimental data whereas the ECPSSR theory underestimates it. However, the MECPSSR theory with the degree of united atom formation α=0.5 shows good agreement with the experimental data. Furthermore, a comparison with the proton induced x-ray production cross sections reported by Reis and Jesus show that the values by Si-ion impact (heavier projectile) are much higher and are approximately proportional to the square of the charge state of the ion. (author)