Momentum-Transfer Dependence of theLII,IIIEdge of Mg

Theory of the soft-x-ray edge problem in simple metals: historical survey and recent developments

“…It does not imply the breakdown of the MND model in Li. It is true that the experiment of Ritsko et al for Li and that of Slusky et al (1976) for Mg tested negatively the prediction of Doniach et al (1971) that an edge peak would be observed, even in the K excitation spectrum, if the momentum transfer q of an incident electron were large enough to relax the selection rule. But Slusky et al (1979) showed later that in the case of Na, K, and Mg, the q dependence of the loss spectrum was not contradictory to the MND theory.…”

Band-Structure Contributions to X-Ray Emission and Absorption Spectra and Edges in Magnesium

“…1 ' 2 In the simple metals Li, Be, Na, Mg, and Al the shapes of the observed threshold edges in both emission and absorption fail to exhibit the sharp step-function edges expected to be characteristic of free-electron metals. Instead, experimentally determined edges are either sharp and peaked at 6 E. R. Domb, T 0 Mihalisin, and J 0 Skalyo, Jr., Phys. Rev.…”

“…These theories predict threshold edges whose shapes are characterized by threshold exponents a 0 (for L 2t3 edges) and a 1 (for K edges); for photoemission the asymmetry of the line shape is characterized by 5 AE-OJ^, Serious objections have, however, been raised recently about the results of the many-body theory since the accepted values of the parameters in the theory produce threshold shapes that are either inconsistent with or different from the experimental data. Indeed, Slusky et al 6 have found that they cannot consistently describe their electron-energy-loss experiments on Mg assuming that the line shapes are caused exclusively by the Mahan-Nozi&res-de Dominicis effect.…”

“…Amorphous solids made up primarily from Group-IV or Group-V elements typically have w-type thermopower, 4 exhibit variable-range hopping at low temperature, 5 show an EPR signal, 6 and have a Fermi energy which can be moved by varying the electronic density. 7 In contrast to this, chalcogenide glasses generally have />-type thermopower, 4 do not exhibit variable-range hopping, 1 " 3 do not show an EPR signal, 8 and have a Fermi energy which does not vary much with electronic density.…”

X-ray line shapes of metals: Exact solutions of a final-state interaction model

“…For instance, the L II,III edges of Na, [1][2][3][4][5][6][7][8][9][10][11] Mg, 1,4,6,7,[10][11][12][13][14][15][16][17][18][19][20] and Al, 1,4,6,7,11,12,[14][15][16][17]19,[21][22][23] as well as the M II,III edge of K, [24][25][26] are sharp but slightly peaked while the K edges of Li, 1,3,6,7,13,14,19,20,23,[27]...…”