Kβ′ satellite of the Kβ1 X-ray emission line of Fe(NH4)2β(SO4)2β6H2O

The Structure of X-ray Emission of K?-Line in Selected Iron-Dysprosium and Iron-Yttrium Compounds

“…It was noticed that if the collective motion within part of the electrons belonging to the atoms in particular crystallographic positions was treated as "free electrons" (i.e. utilizing the elementary formula for plasmon energy excitation in free electron gas applied earlier by Srivastava et al [5,6]) it gives very good agreement with the experimentally obtained positions of the K b satellites. Basically, the same idea was exploited in the present paper: the number of electrons hypothetically participating in collective excitations was evaluated from the positions of the satellites.…”

“…The X-ray K emission spectra in a wide range of elements and their compounds are still of interest for many authors [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] and many interesting features of those spectra have been found so far. In particular, in different substances containing transition metals, the satellites on the low energy side of the main K b peak have been observed.…”

“…Several concepts have been proposed to explain their appearance, e.g. molecular orbital theory [4,9], magnetic properties of atomic electrons and exchange interactions in transition metals [1][2][3]18], the radiative Auger effects [16] and electron plasma excitation in solids [5][6][7]14]. Since plasmon excitations are present in solids (evidenced by either X-ray emission [13,14], or by other techniques [19,20]) we have found this last idea particularly interesting and have used it to explain K b satellites in spinels [7].…”