Cross sections of X-ray production induced on Ti, Fe, Zn, Nb and Ta by O, Cl, Cu and Br ions with energies between 4 MeV and 40 MeV

TL;DR

This study measures the differential X-ray production cross sections induced by various ions on different targets between 4 and 40 MeV, comparing experimental data with theoretical models and previous results.

Contribution

It provides new experimental cross section data for O, Cl, Cu, and Br ions on Ti, Fe, Zn, Nb, and Ta targets, and evaluates the accuracy of existing theoretical models.

Findings

Experimental cross sections agree with previous data over a wide energy range.

Theory matches oxygen ion results but significantly underestimates heavier ion cross sections.

Discrepancies highlight limitations of current theoretical models for heavy ions.

Abstract

Differential cross section of X-ray production induced by O, Cl, Cu and Br ions with energies between 4 MeV and 40 MeV have been measured for thin targets of Ti, Fe, Zn, Nb and Ta in a direct way. A fully characterized silicon drift diode was used as X-rays detector. Beam currents have been measured by a system of two Faraday cups. Corrections for target thickness effects have been applied to the raw data. Experimental cross sections are compared both with theory and with previously published results. Experimental results from other authors are in reasonable agreement with ours over a wide energy range. Theory produces consistent results in the case of oxygen ions but gives cross sections even orders of magnitude below the experimental ones for heavier ions (ECPSSR-UA) or contrasting results (PWBA) depending on the ion-target combination.