Solid-state binding, recombination, and Auger energy shifts of rare-earth metals

Journal Article · Fri Jul 15 04:00:00 EDT 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.38.1763· OSTI ID:7032873

Richter, M; Prescher, T; Meyer, M; Raven, E v; Sonntag, B; Wetzel, H E; Aksela, S

The free-atom binding energies up to 4d core levels have been determined from monochromatic synchrotron-radiation-excited photoelectron spectra for the elements La, Ce, Nd, Sm, Eu, and Gd. They are compared with the corresponding solid-state values, and the atom-to-metal binding energy shifts are discussed in comparison with the theoretical calculations available. Atomic and solid-state 4d-based Auger and direct recombination (autoionization) spectra of the elements La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, and Tm have also been studied and are compared in detail. The spectra show clearly very different solid-state shifts for the 4d-based Auger and 4d..-->..(4f,epsilonf) autoionization peaks indicating a very useful method for distinguishing these two processes in electron-excited spectra. The intensities of the recombination peaks in the spectra of La, Ce, Sm, Eu, and Gd were also measured, using the white-light synchrotron radiation obtained in zeroth order from a toroidal-grating monochromator, and were found to be increased in intensity. The autoionization and Auger energy shifts are discussed in terms of theoretical models.

• Research Organization: II. Institut fuer Experimentalphysik, Universitaet Hamburg, D-2000 Hamburg 50, West Germany
• OSTI ID: 7032873
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:3; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
AUGER EFFECT
BINDING ENERGY
BREMSSTRAHLUNG
COMPARATIVE EVALUATIONS
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY
FLUIDS
GASES
METALS
PHOTOELECTRON SPECTROSCOPY
RADIATIONS
RARE EARTHS
RECOMBINATION
SOLIDS
SPECTROSCOPY
SURFACE PROPERTIES
SYNCHROTRON RADIATION
VAPORS