Actions for Systematic investigation of electron impact excitation-autoionization from the groud state of highly charged GaI-like ions through. Delta. N=1 transitions [electronic resource].

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Systematic investigation of electron impact excitation-autoionization from the groud state of highly charged GaI-like ions through. Delta. N=1 transitions [electronic resource].

Published
Washington, D.C : United States. Dept. of Energy. Office of Energy Research, 1991.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
Pages: (8 pages) : digital, PDF file
Additional Creators
Lawrence Livermore National Laboratory, United States. Department of Energy. Office of Energy Research, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
A systematic variation in the line intensity ratios of GaI-like and ZnI-like ions of rare earth elements has been recently observed in spectra emitted in a low density, high temperature tokamak plasma. This variation is shown to be correlated with the gradual opening of autoionizing channels through inner-shell excited configurations of the GaI-like charge-state. These channels enhance the indirect ionization rate of GaI-like ions through excitation-autoionization (EA), effecting the ionization balance and temperatures of greatest abundance. We present a systematic investigation of EA and direct impact ionization (DI) in the GaI-like isoelectronic sequence from Mo (Z = 42) to Dy (Z = 66). As Z decreases from Dy to Pr (Z = 59) the levels of the configuration 3d⁹4p4f, which are excited from the ground state by strong dipole collisional transitions, gradually cross the first ionization limit of the ion and are responsible for this ionization enhancement. When Z decreases further an additional channel is opened through the configuration 3d⁹4p4d. 9 refs., 3 figs., 1 tab.
Report Numbers
E 1.99:ucrl-jc-105958
E 1.99: conf-9010298--3
conf-9010298--3
ucrl-jc-105958
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Note
Published through SciTech Connect.
01/11/1991.
"ucrl-jc-105958"
" conf-9010298--3"
"DE91007611"
International workshop on radiative properties of hot dense matter, Sarasota, FL (USA), 22-26 Oct 1990.
Goldstein, W.H.; Bar-Shalom, A. . Nuclear Research Center; Oreg, J.; Schwob, J.L.; Klapisch, M. . Racah Inst. of Physics; Meroz, E.; Mandlebaum, P.; Mittnik, D.
Funding Information
W-7405-ENG-48
View MARC record | catkey: 14751096