Linear ligand fields influencing auger spectra of fluorides, copper(I) and silver(I)

✍ Scribed by C.K. JØrgensen; H. Berthou

• Publisher: Elsevier Science
• Year: 1974
• Tongue: English
• Weight: 624 KB
• Volume: 25
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(74)80323-4

✦ Synopsis

Tne multiplet splitting of final states of Auger transitions corresponding to p' and dg in spherical symmetry has been treated by several authors. Here the chemical influence of linear bonding is discussed. The Auger spectrum of neon atoms [l] initially lacking a Is electron consists of six lines corresponding, in order of decreasing kinetic energy E,,, to the multiplets 3P, ID and 1s of the configuration ls22s2p4 of NeZ+ 3P imd 'P of ls22s2p5 and 1s of 1s%!p6_ For suffic'iently small systems, there is no imperative reason to doubt the Copenhagen interpretation [2] and hence, the final state defines the energy difference available for the ejected electron. Since the 1s ionization energy is known from photoelectron spectra [3] to be 870.2 eV, the known energy levels of Ne*+ and ionization energies of Ne and Ne+ [43 allow Etin = 807.7,804.5,800.8,782.3 and 771.8 eV to be evahrated for the five first Auger signals. The experimental values [3] are 808.0,804.8,801.1,782_6 and 772.1 eV, all exactly 0.3 eV lower. However, the experimental uncertainty is reported to be 0.6 eV. The kinetic energy of the recoiling neon ion is negligible on this scale, and there is no known obvious reasons for any deviations between these figures. In molecules and in solids, one may expect shifts of Ekin because of the Franck-Condon principle. Thus vibrational structure has been detected [S] in the X-ray spectrum of N2 and an effect contributing [6] to the observed width of photoelectron signals, e.g., of lithium in solids, is the non-optimized internuclear distances_ Most Auger spectra published are for metallic ele-