Stark effect of atomic helium singlet lines

L Windholz; Tomasz J. Wąsowicz; Ryszard Drozdowski; Jerzy Kwela

doi:10.1364/josab.29.000934

Stark effect of atomic helium singlet lines

Abstract

We present experimental and theoretical investigations of the He spectral series 2S1−nQ1 (n=3÷9, Q=S,P,D,…,n−1) and 2P1−nQ1 (n=3÷9, Q=S,P,D,…,n−1) in electric fields up to 1635 kV/cm. Apart from the allowed transitions with |ΔL|=1, the transitions with |ΔL|=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.

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Keywords

EFEKT STARKA

Details

Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS no. 29,
ISSN: 0740-3224
Language:: English
Publication year:: 2012
Bibliographic description:: Windholz L., Wąsowicz T., Drozdowski R., Kwela J.: Stark effect of atomic helium singlet lines// JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS. -Vol. 29, nr. iss. 5 (2012),
DOI:: Digital Object Identifier (open in new tab) 10.1364/josab.29.000934
Verified by:: Gdańsk University of Technology