Kinematic coefficient ratios, anisotropy parameters, and polarization degrees of L3 X-ray transitions of Bi, Pb, Ta, Lu, and Yb

Abstract

The anisotropy parameter values β of the L shell fluorescent X-rays (LL (L3-M1), Lβ6 (L3-N1), Lα1,2 (L3-M5,4) and Lβ2,15 (L3-N5,4) of Bi, Pb, Ta, Lu, and Yb excited by 22.6 keV photons were measured. These values were used to determine the kinematic coefficient ratios α(LL/Lα1,2), α(LL/Lβ6), and α(Lα1,2/Lβ2,15). The LL and Lβ6 X-rays were found to be anisotropically emitted whereas Lα1,2 and Lβ2,15 X-rays showed less anisotropic spatial distributions. Also, the polarization degrees of LL and Lα X-rays were measured for the present elements and observed that the LL lines were found to be strongly polarized whereas the Lα lines showed less polarization. © 2015 Published by NRC Research Press.