Single-photon multiple ionization of argon in the [ital K]-edge region

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.51.2939· OSTI ID:6584939

Morgan, D V; Bartlett, R J ^[1]; Sagurton, M ^[2]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. Los Alamos National Laboratory/SFA, National Synchrotron Light Source, Bldg. 725-X8, Brookhaven National Laboratory, Upton, New York 11973 (United States)

The individual charge state and total ion yields resulting from the photoionization of argon gas have been measured as a function of photon energy through the [ital K] edge using synchrotron radiation and time-of-flight spectroscopy. We have formulated a model for the mean ion charge [ital [bar q]]([ital h][nu]) observed at nominal photon energy [ital h][nu], and have determined the mean ion charge [ital [bar q]] resulting from the decay of the atom following [1[ital s]]4[ital p], [1[ital s]]5[ital p], and [1[ital s]][var epsilon][ital p] photoabsorption. We have also characterized the energy-dependent photoelectron recapture probability due to postcollision interaction. In contrast with the recent analysis by Doppelfeld [ital et] [ital al]. [J. Phys. B 26, 445 (1993)], we find that the gradual increase in [ital [bar q]]([ital h][nu]) that begins approximately 20 eV below the argon [ital K] edge can be attributed to lifetime energy broadening of the [ital K]-hole state and the finite energy width of the x-ray source.

• OSTI ID: 6584939
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 50:4; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
BREMSSTRAHLUNG
CAPTURE
CHARGE STATES
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE
ELECTRONIC STRUCTURE
ELEMENTS
FLUIDS
GASES
IONIZATION
K SHELL
LIFETIME
MULTI-PHOTON PROCESSES
NONMETALS
PHOTOIONIZATION
RADIATIONS
RARE GASES
SYNCHROTRON RADIATION
TIME-OF-FLIGHT METHOD