Atomic inner-shell threshold excitation with synchrotron radiation
Conference
·
· AIP Conf. Proc.; (United States)
OSTI ID:5611670
Monochromatized synchrotron radiation from a focused 8-pole wiggler beam line has been used to excite the L/sub 2/ and L/sub 3/ holes of atomic Xe and the K hole of atomic Ar near their photoionization thresholds. The Xe L/sub 3/-M/sub 4/M/sub 5/ (/sup 1/G/sub 4/) Auger line, the Xe L/sub 2/-L/sub 3/N/sub 45/ Coster-Kronig line, and the Ar K-L/sub 23/L/sub 23/ Auger line with incident x-ray energies from approx.20 eV below threshold to approx.200 eV above threshold have been measured. The spectra allow accurate determination of spectator-satellite energy shifts, post-collision interaction (PCI) shifts in the diagram-line energy, and spectral changes associated with the resonant Raman Auger (RRA) effect. The energies of satellites corresponding to photoelectrons promoted to bound states exhibit linear dispersion as a function of the initial photon energy. The measured post-collision interaction energy shifts of the diagram lines agree qualitatively with semiclassical PCI theory above threshold. In all cases, the energy of the diagram line is observed to decrease below threshold. The intensity of the 5d spectator line associated with the Xe L/sub 3/-M/sub 4/M/sub 5/ line is larger than expected from absorption measurements. 7 references, 7 figures.
- Research Organization:
- Oak Ridge National Lab., TN
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5611670
- Report Number(s):
- CONF-820855-
- Conference Information:
- Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 94
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
AUGER EFFECT
BREMSSTRAHLUNG
COSTER-KRONIG TRANSITIONS
DATA
DE-EXCITATION
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXPERIMENTAL DATA
FLUIDS
GASES
INFORMATION
INNER-SHELL IONIZATION
IONIZATION
IONIZING RADIATIONS
K SHELL
L SHELL
NONMETALS
NUMERICAL DATA
RADIATIONS
RAMAN EFFECT
RARE GASES
SPECTRA
SYNCHROTRON RADIATION
X RADIATION
XENON
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
AUGER EFFECT
BREMSSTRAHLUNG
COSTER-KRONIG TRANSITIONS
DATA
DE-EXCITATION
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXPERIMENTAL DATA
FLUIDS
GASES
INFORMATION
INNER-SHELL IONIZATION
IONIZATION
IONIZING RADIATIONS
K SHELL
L SHELL
NONMETALS
NUMERICAL DATA
RADIATIONS
RAMAN EFFECT
RARE GASES
SPECTRA
SYNCHROTRON RADIATION
X RADIATION
XENON