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High resolution study of the inner-shell 3p-3d and 3p-5s resonance regions in calcium atoms

Iablonskyi, D.; Urpelainen, Samuli LU ; Huttula, S. -M.; Fritzsche, S. and Huttula, M. (2013) In Journal of Electron Spectroscopy and Related Phenomena 186. p.8-13
Abstract
The 3p(5)4s(2)3d P-1(1) and 3p(5)(P-2(3/2))4s(2)5s (2)[3/2](1) resonance regions of Ca atoms have been studied experimentally with the aid of synchrotron radiation excited electron spectroscopy. The strong configuration interaction of the 3p(5)4s(2)3d, 3p(5)4s(2)5s and several other nearly degenerate configurations leads to complex structures observed in the photoelectron yield spectrum. Multiconfiguration Dirac-Fock (MCDF) calculations have been performed for these 3p-excited resonances of neutral calcium and compared to experimental results. The excitation and subsequent autoionization of these resonances lead to the final ionic 3p(6)nl states from which new high-lying members of the Rydberg p-series have been resolved experimentally.... (More)
The 3p(5)4s(2)3d P-1(1) and 3p(5)(P-2(3/2))4s(2)5s (2)[3/2](1) resonance regions of Ca atoms have been studied experimentally with the aid of synchrotron radiation excited electron spectroscopy. The strong configuration interaction of the 3p(5)4s(2)3d, 3p(5)4s(2)5s and several other nearly degenerate configurations leads to complex structures observed in the photoelectron yield spectrum. Multiconfiguration Dirac-Fock (MCDF) calculations have been performed for these 3p-excited resonances of neutral calcium and compared to experimental results. The excitation and subsequent autoionization of these resonances lead to the final ionic 3p(6)nl states from which new high-lying members of the Rydberg p-series have been resolved experimentally. These new levels agree reasonably well with calculations as well as with the extrapolation of the Rydberg formula. The post collision interaction (PCI) effect has been observed in the transition Ca+ 3p(5)3d4s P-2(1/2,3/2)-> Ca2+ 3p(6) S-1(0) + e(Auger)(-) and explained by means of the rather long core-hole lifetime, while the decay of Ca+ 3p(5)3d4s P-4(1/2),(3/2,5/2) states is not affected by PCI. (c) 2013 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Photoelectron yield, Resonant Auger decay, Post collision interaction, Rydberg states, Atomic Ca, Ab initio calculations
in
Journal of Electron Spectroscopy and Related Phenomena
volume
186
pages
8 - 13
publisher
Elsevier
external identifiers
  • wos:000319033300002
  • scopus:84876372137
ISSN
0368-2048
DOI
10.1016/j.elspec.2013.01.015
language
English
LU publication?
yes
id
57b0dedd-71b6-4753-af05-909fe5d1b290 (old id 3935677)
date added to LUP
2013-07-15 10:08:36
date last changed
2019-02-20 05:23:10
@article{57b0dedd-71b6-4753-af05-909fe5d1b290,
  abstract     = {The 3p(5)4s(2)3d P-1(1) and 3p(5)(P-2(3/2))4s(2)5s (2)[3/2](1) resonance regions of Ca atoms have been studied experimentally with the aid of synchrotron radiation excited electron spectroscopy. The strong configuration interaction of the 3p(5)4s(2)3d, 3p(5)4s(2)5s and several other nearly degenerate configurations leads to complex structures observed in the photoelectron yield spectrum. Multiconfiguration Dirac-Fock (MCDF) calculations have been performed for these 3p-excited resonances of neutral calcium and compared to experimental results. The excitation and subsequent autoionization of these resonances lead to the final ionic 3p(6)nl states from which new high-lying members of the Rydberg p-series have been resolved experimentally. These new levels agree reasonably well with calculations as well as with the extrapolation of the Rydberg formula. The post collision interaction (PCI) effect has been observed in the transition Ca+ 3p(5)3d4s P-2(1/2,3/2)-> Ca2+ 3p(6) S-1(0) + e(Auger)(-) and explained by means of the rather long core-hole lifetime, while the decay of Ca+ 3p(5)3d4s P-4(1/2),(3/2,5/2) states is not affected by PCI. (c) 2013 Elsevier B.V. All rights reserved.},
  author       = {Iablonskyi, D. and Urpelainen, Samuli and Huttula, S. -M. and Fritzsche, S. and Huttula, M.},
  issn         = {0368-2048},
  keyword      = {Photoelectron yield,Resonant Auger decay,Post collision interaction,Rydberg states,Atomic Ca,Ab initio calculations},
  language     = {eng},
  pages        = {8--13},
  publisher    = {Elsevier},
  series       = {Journal of Electron Spectroscopy and Related Phenomena},
  title        = {High resolution study of the inner-shell 3p-3d and 3p-5s resonance regions in calcium atoms},
  url          = {http://dx.doi.org/10.1016/j.elspec.2013.01.015},
  volume       = {186},
  year         = {2013},
}