Ag K-shell ionization by electron impact: New cross-section measurements between 50 and 100 keV and review of previous experimental data

作者：Vanin V R^*; Manso Guevara M V; Maidana N L; Martins M N; Fernandez Varea J M

来源：Radiation Physics and Chemistry, 2016, 119: 14-23.

DOI：10.1016/j.radphyschem.2015.09.005

• Atomic K shell
• Electron-impact ionization
• Distorted-wave Born approximation
• Ag K x-rays

We report the measurement of Ag K-shell ionization cross-section by electron impact in the range 50.100 keV and review the experimental data found in the literature. The sample consisted in a thin film of Ag evaporated on a thin C backing. The x-ray spectra generated by electron bombardment in the Sao Paulo Microtron were observed with a planar HPGe detector. The ratios between characteristic and bremsstrahlung x-ray yields were transformed to ionization cross sections with the help of theoretical atomic-field bremsstrahlung cross sections. The measured cross sections are compared with existing experimental values and calculations based on the semi-relativistic distorted-wave Born approximation. According to our experiment, the ratio of Ag K beta to K alpha x-ray intensities is 0.2018(24).

• 出版日期2016-2