Condensed excited states in beryllium

Results are presented from theoretical investigations of condensed excited states of beryllium by the Hartree–Fock method with allowance for the width of the atomic levels. It is shown that, during the excitation of a beryllium atom in the X-ray energy range, the 2p states split, unequal shift of on...

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Bibliographic Details
Published inComputational materials science Vol. 36; no. 1; pp. 217 - 220
Main Author Popov, A.V.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.05.2006
Subjects
Beryllium
Condensed excited states
Electronic structure
Lifetime
34.50.Gb
Electronic structure
Lifetime
Condensed excited states
Beryllium
34.60.+z
33.80.R
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Summary:Results are presented from theoretical investigations of condensed excited states of beryllium by the Hartree–Fock method with allowance for the width of the atomic levels. It is shown that, during the excitation of a beryllium atom in the X-ray energy range, the 2p states split, unequal shift of one-electron energy levels and mixing of the 2s and 2p states at excitation energies of 10 and 14 Ry are observed, and the atom is stabilized at energies higher than 6.7 Ry. In the optical range of excitation energies, a condensed excited state of beryllium with a lifetime up to 0.1 fs is revealed.
Bibliography:SourceType-Scholarly Journals-2
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ISSN:0927-0256
1879-0801
DOI:10.1016/j.commatsci.2005.06.005