Variation of the L X-ray fluorescence cross-sections, intensity ratios and fluorescence yields of Sm and Eu in halogen compounds

► Chemical effect on L-X-ray of Sm and Eu in Halogen (F, Cl and Br) compounds. ► Fluorescence cross-sections, X-ray intensity ratios, L shell fluorescence yields. ► At 59.543 keV exciting energy. ► Results were compared with theoretical values. ► Changes according to the pure element.