Measurement of L X-ray fluorescence cross sections and relative intensities for elements 56⩽Z⩽66 in the energy range 11-41 keV

Abstract

The L X-ray fluorescence cross sections ( sigma L alpha , sigma L beta and sigma L gamma ) and relative intensities (IL beta /IL alpha and IL gamma /Ialpha ) for La, Pr, Sm, Eu, Gd, Tb and Dy have been measured at various photon energies in the range of 11-41 keV. In addition the revised measured values of L XRF cross sections and relative intensities for Ba, Ce and Nd are also reported. A reasonable agreement is found between the present measured results and the theoretically calculated values of L XRF cross sections and relative intensities using various physical parameters based on relativistic theory. To the best of the authors' knowledge, the L XRF cross sections and relative intensities for these elements at different energies, except those of Nd, Sm, Gd, Tb and Dy at 17.8 and 25.8 KeV are being reported for the first time.