| Numéro |
J. Phys. Colloques
Volume 32, Numéro C4, Octobre 1971
COLLOQUE INTERNATIONAL DU C.N.R.S.PROCESSUS ÉLECTRONIQUES SIMPLES ET MULTIPLES DU DOMAINE X ET X-UV |
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|---|---|---|
| Page(s) | C4-85 - C4-87 | |
| DOI | https://doi.org/10.1051/jphyscol:1971417 | |
PROCESSUS ÉLECTRONIQUES SIMPLES ET MULTIPLES DU DOMAINE X ET X-UV
J. Phys. Colloques 32 (1971) C4-85-C4-87
DOI: 10.1051/jphyscol:1971417
RESONANCES IN THE PHOTOIONIZATION CONTINUUM OF LITHIUM I (55 TO 70 eV)
D. L. EDERER, T. LUCATORTO and R. P. MADDENNational Bureau of Standards Washington, D. C. 20234
Abstract
Resonances in the photoionization continuum of lithium
have been observed by absorption spectroscopy in the region of 55 to 70 eV.
These resonances are associated with configurations of the type (1 s 2 snl) and
(1 snln'l') and lie more than 50 eV above the ionization potential ; the lowest
lying most prominent of these can be identified with configurations of the type
(1 s 2 snp) 2P. A multiconfiguration calculation for the first five
members of the series (performed by A. Weiss) has yielded values for the
energies which agree with experimental results to within 2 eV. The design of
the lithium vapor absorption furnace was based on the heat-pipe principle.
Argon, which has very little structure in the region from 55 to 70 eV, was used
as a buffer gas and was contained inside the furnace by thin film aluminum
windows. The light source was the 180 MeV NBS synchrotron.