Measurements of the line resolved M-shell X-ray production cross sections for_(79)Au,_(82)Pb and _(83)Bi by 100 keV/u proton, C, N, O ions

摘要

The cross sections for production of the M_k (k = ξ, αβ, γ, m_1) X-rays of _(79)Au, _(82)Pb and _(83)Bi induced by the 100 keV/u proton, C~(4+), N~(5+) and O~(6+) ions have been measured in the present work. The experimental cross sections have been compared with the earlier reported values and those calculated using the ionization cross sections based on the ECPSSR model, the X-ray emission rates based on the Dirac-Fock model, the fluorescence and Coster-Kronig yields based on the Dirac-Hartree-Slater model. In addition, the present measured proton induced X-ray production cross sections have also been compared with those calculated using the Dirac-Hartree-Slater model based ionization cross sections. The intensity ratios among the M_k X-rays have been deduced and compared with the theoretical values. The present measured M_k (k = ξ, αβ, γ, m_1) X-ray production cross sections are found to be very high as compared to the theoretical values. The total M X-ray production cross sections for the targets under investigation exhibited Z_p~2 dependence; Z_p denotes the projectile atomic number.