The polarization of X-rays and magnetic photoionization cross-sections for L-3 sub-shell


Han I., ŞAHİN M. , DEMİR L.

APPLIED RADIATION AND ISOTOPES, vol.67, no.6, pp.1027-1032, 2009 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 67 Issue: 6
  • Publication Date: 2009
  • Doi Number: 10.1016/j.apradiso.2009.01.073
  • Title of Journal : APPLIED RADIATION AND ISOTOPES
  • Page Numbers: pp.1027-1032

Abstract

The alignment of atoms with inner-shell vacancies resulting from ionization by photons was investigated by measuring the anisotropic emission of L shell X-ray lines. The X-ray line intensities were measured using an Si(Li) detector and radioisotope photon source in various emission angles. It was observed from measured intensities that L alpha and Ll X-ray intensities for the L-3 sub-state depended on the emission angle, meaning that L alpha and Ll X-rays had an anisotropic spatial distribution. Thus, the L alpha to Ll intensity ratios for a set of elements were determined and alignment parameters for each element were obtained using these ratios. Also, the empirical values of the L-3 magnetic sub-state photoionization cross-sections for m(j) = 3/2 and 1/2 were evaluated using the determined alignment parameters, sub-state photoionization cross-sections and the Coster-Kronig transition probabilities. (C) 2009 Elsevier Ltd. All rights reserved.