Eur. Phys. J. D 46, 487-492 (2008)
https://doi.org/10.1140/epjd/e2007-00331-2

Measurement of angular dependence of M X-ray production cross-sections in Re, Bi and U at 5.96 keV

¹ Department of Physics, Faculty of Art and Sciences, Karadeniz Technical University, 61080 Trabzon, Turkey
² Department of Physics, Faculty of Art and Sciences, Kahramanmaraş Sütçü İmam University, 46100 Kahramanmaraş, Turkey

Corresponding author: ^a gapaydin@ktu.edu.tr

Received: 9 November 2006
Revised: 28 March 2007
Published online: 12 December 2007

Abstract

The M X-ray production differential cross sections in Re, Bi and U elements have been measured at the 5.96 keV incident photon energy in an angular range 135°–155°. The measurements were performed using a ⁵⁵Fe source and a Si(Li) detector. The present results contradict the predictions of Cooper and Zare [Atomic Collision Processes, Gordon and Breach, New York (1969)] and experimental results of Kumar et al. [J. Phys. B: At. Mol. Opt. 34, 613 (2001)]. that, after photoionization of inner shells, the vacancy state has equal population of magnetic substates and the subsequent X-ray emission is isotropic, but confirm the predictions of the calculations of Flügge et al. [Phys. Rev. Lett. 29, 7 (1972)] and experimental results of Sharma and Allawadhi [J. Phys. B: At. Mol. Opt. 32, 2343 (1999)] and Ertugrul [Nucl. Instrum. Meth. B 119, 345 (1996)]. Total M X-ray production cross sections from the decay at the 5.96 keV photon energies are found to be in good agreement with the calculated theoretical results using the theoretical values of M shell photoionization cross section.