Photoion Auger-electron coincidence measurements near threshold
- Tennessee Univ., Knoxville, TN (USA). Dept. of Physics Oak Ridge National Lab., TN (USA)
- National Inst. of Standards and Technology (NCSL), Gaithersburg, MD (USA)
The vacancy cascade which fills an atomic inner-shell hole is a complex process which can proceed by a variety of paths, often resulting in a broad distribution of photoion charge states. We have measured simplified argon photoion charge distributions by requiring a coincidence with a K-LL or K-LM Auger electron, following K excitation with synchrotron radiation, as a function of photon energy, and report here in detail the argon charge distributions coincident with K-L{sub 1}L{sub 23} Auger electrons. The distributions exhibit a much more pronounced photon-energy dependence than do the more complicated non-coincident spectra. Resonant excitation of the K electron to np levels, shakeoff of these np electrons by subsequent decay processes, double-Auger decay, and recapture of the K photoelectron through postcollision interaction occur with significant probability. 17 refs.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- Sponsoring Organization:
- DOE/ER; National Science Foundation (NSF)
- DOE Contract Number:
- AC05-84OR21400; AC02-76CH00016
- OSTI ID:
- 6477501
- Report Number(s):
- CONF-901116-14; ON: DE91001211; TRN: 91-000015
- Resource Relation:
- Conference: 11. international conference on the application of accelerators in research and industry, Denton, TX (USA), 5-8 Nov 1990
- Country of Publication:
- United States
- Language:
- English
Similar Records
X-ray fluorescence and Auger-electron coincidence spectroscopy of vacancy cascades in atomic argon
Study of inner-shell vacancy cascades by coincidence techniques
Related Subjects
ARGON IONS
AUGER ELECTRON SPECTROSCOPY
AUTOIONIZATION
CHARGE DISTRIBUTION
CHARGE STATES
COINCIDENCE METHODS
EXCITATION
EXPERIMENTAL DATA
K SHELL
MULTICHARGED IONS
PHOTOIONIZATION
SYNCHROTRON RADIATION SOURCES
CHARGED PARTICLES
COUNTING TECHNIQUES
DATA
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ENERGY-LEVEL TRANSITIONS
INFORMATION
IONIZATION
IONS
NUMERICAL DATA
RADIATION SOURCES
SPECTROSCOPY
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory