When silver nano particles sample is analyzed through EDX analysis for sample purity O =SiO2, Ag= Ag as standard. The results show letter K and L with elements in table like O K, Ag L. what these letters represent (K and L) along oxygen and sliver)
according to the above table provided by Yuriy the designation 'K' or 'L' of the fluorescence lines is coupled to excitation of the K or the L shell where they arise from due to recombination of the K- and L-shell vacancies.