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  Quenching of the 2pnd 1Po doubly excited states of helium by a dc electric field

Bučar, K., Žitnik, M., Mihelič, A., Penent, F., Lablanquie, P., Palaudoux, J., et al. (2014). Quenching of the 2pnd 1Po doubly excited states of helium by a dc electric field. Physical Review A, 90(1): 013412. doi:10.1103/PhysRevA.90.013412.

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PhysRevA.90.013412.pdf (Publisher version), 542KB
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PhysRevA.90.013412.pdf
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 Creators:
Bučar, K.1, Author
Žitnik, M.1, Author
Mihelič, A.1, Author
Penent, F.2, 3, Author
Lablanquie, P.2, 3, Author
Palaudoux, J.2, 3, Author
Andrić, L.2, 3, Author
Braune, Markus4, Author              
Püttner, R.5, Author
Affiliations:
1Jožef Stefan Institute, Jamova cesta 39, SI-1001 Ljubljana, Slovenia, ou_persistent22              
2PMC, Université Paris 06, LCPMR, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France, ou_persistent22              
3CNRS, LCPMR (UMR 7614), 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France, ou_persistent22              
4Molecular Physics, Fritz Haber Institute, Max Planck Society, ou_634545              
5Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin-Dahlem, Germany, ou_persistent22              

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 Abstract: The fluorescence yield quenching of low-lying doubly excited 2pnd 1Po states is observed to depend strongly on a dc electric field strength and its orientation with respect to the polarization of the incoming photon beam. The reduction of the yield accompanied by the lifetime shortening is attributed to the Stark mixing with the neighboring 2sns 1Se states, which redirects the 2pnd 1Po decay to the prompt autoionization channel. For n≥4, the lifetimes decrease from several hundred picoseconds down to several tens of picoseconds when an electric field in the kV/cm range is applied parallel to the photon probe polarization. Practically no lifetime change is observed for polarization perpendicular to the electric field direction. The results of the complex-scaling calculations are in a good agreement with the experimental data.

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Language(s): eng - English
 Dates: 2014-04-172014-07-112014-07
 Publication Status: Published in print
 Pages: 7
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1103/PhysRevA.90.013412
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Title: Physical Review A
  Other : Phys. Rev. A
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 90 (1) Sequence Number: 013412 Start / End Page: - Identifier: ISSN: 1050-2947
CoNE: https://pure.mpg.de/cone/journals/resource/954925225012_2