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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 5 — May. 1, 2012
  • pp: 934–943

Stark effect of atomic Helium singlet lines

L. Windholz, T. J. Wasowicz, R. Drozdowski, and J. Kwela  »View Author Affiliations


JOSA B, Vol. 29, Issue 5, pp. 934-943 (2012)
http://dx.doi.org/10.1364/JOSAB.29.000934


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Abstract

We present experimental and theoretical investigations of the He spectral series 2 S 1 n Q 1 ( n = 3 ÷ 9 , Q = S , P , D , , n 1 ) and 2 P 1 n Q 1 ( n = 3 ÷ 9 , Q = S , P , D , , n 1 ) in electric fields up to 1635 kV / cm . Apart from the allowed transitions with | Δ L | = 1 , the transitions with | Δ L | = 0 , 2 , 3 , —without field strictly forbidden—were observed. Several He patterns become similar to hydrogen patterns, which means they are nearly symmetric and show in higher fields nearly linear Stark shifts. The applied fields are high enough that patterns belonging to neighboring principal quantum numbers (for n > 6 ) begin to overlap, which leads to interesting level-anticrossing effects. The experimental results are compared with numerical calculations, taking into account mixing between states of different principal quantum numbers and between singlet and triplet states. The agreement between experimental and theoretical results is quite good.

© 2012 Optical Society of America

OCIS Codes
(020.3690) Atomic and molecular physics : Line shapes and shifts
(020.6580) Atomic and molecular physics : Stark effect

ToC Category:
Atomic and Molecular Physics

History
Original Manuscript: September 13, 2011
Manuscript Accepted: November 6, 2011
Published: April 10, 2012

Citation
L. Windholz, T. J. Wasowicz, R. Drozdowski, and J. Kwela, "Stark effect of atomic Helium singlet lines," J. Opt. Soc. Am. B 29, 934-943 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-5-934

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