K-shell X-ray production cross sections of Ti, Cr, Ni and Zn induced by chlorine ions

F Fernandes; P L Grande; J F Dias

doi:10.1016/j.apradiso.2023.110903

K-shell X-ray production cross sections of Ti, Cr, Ni and Zn induced by chlorine ions

Appl Radiat Isot. 2023 Sep:199:110903. doi: 10.1016/j.apradiso.2023.110903. Epub 2023 Jun 15.

Authors

F Fernandes¹, P L Grande¹, J F Dias²

Affiliations

¹ Ion Implantation Laboratory, Institute of Physics, Federal University of Rio Grande do Sul, Av. Bento Gonçalves 9500, P.O. Box 15051, CEP 91501-970, Porto Alegre, RS, Brazil.
² Ion Implantation Laboratory, Institute of Physics, Federal University of Rio Grande do Sul, Av. Bento Gonçalves 9500, P.O. Box 15051, CEP 91501-970, Porto Alegre, RS, Brazil; Graduate Program on Materials Science, Federal University of Rio Grande do Sul, Av Bento Gonçalves 9500, CEP 91501-970, Porto Alegre, RS, Brazil. Electronic address: jfdias@if.ufrgs.br.

PMID: 37343330
DOI: 10.1016/j.apradiso.2023.110903

Abstract

In this work we report on the results of the total K-shell X-ray production cross sections of Ti, Cr, Ni and Zn induced by Cl⁴⁺ and Cl⁵⁺ ions with energies ranging from 4 MeV to 10 MeV. The experimental results were compared with Atomic Orbitals Coupled-Channels (CC) calculations based on the independent electron model. The experimental X-ray production cross sections vary from about 10^-2 barns for Zn up to 10² barns for Ti. The results obtained for Ti indicate that the present CC calculations underestimate the experimental cross sections up to two orders of magnitude at 10 MeV chlorine bombarding energy. However, the discrepancy between CC calculations and experimental results decreases as both bombarding energy and the atomic number of the target species increase. The dependency of the experiment-theory agreement on the asymmetry and adiabaticity parameters α and η respectively is discussed.

Keywords: Chlorine ions; Coupled-channels calculations; Heavy ions; X-ray production cross section.