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On the thermal broadening of core levels in metals due to many‐electron effects
Author(s) -
Almbladh C.O.,
Minnhagen P.
Publication year - 1978
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220850114
Subject(s) - x ray photoelectron spectroscopy , formalism (music) , electron , atomic physics , thermal , gaussian , chemistry , phonon , homogeneous broadening , doppler broadening , physics , condensed matter physics , spectral line , nuclear magnetic resonance , computational chemistry , quantum mechanics , thermodynamics , art , musical , visual arts
Ferrell's expression for the XPS lineshape is derived in a formalism which explicitly takes the electron—electron interaction into account. Also the corresponding expression for X‐ray absorption is given. In the presence of other broadenings, which are comparable or larger than kT , the electronic part of the core‐level broadening in XPS is indistinguishable from a Gaussian. This Gaussian broadening is of the same order as the expected phonon broadening for Al at room temperature and above, but it is of little importance for Li and Na. In X‐ray absorption, the effect seems in some cases to be important when extracting phonon broadenings from experimental data.