Experimental Determination of the Helium 2 ;{3}P_{1}-1 1S0 Transition Rate.

Experimental Determination of the Helium 2 ;{3}P_{1}-1 1S0 Transition Rate. Research Abstract Details 

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Experimental Determination of the Helium 2 ;{3}P_{1}-1 1S0 Transition Rate. Abstract Text:

R G Dall,K G H Baldwin,L J Byron,A G Truscott,

We present the first experimental determination of the 2 ;{3}P_{1}-1 1S0 transition rate in helium and compare this measurement with theoretical quantum-electrodynamic predictions. The experiment exploits the very long ( approximately 1 minute) confinement times obtained for atoms magneto-optically trapped in an apparatus used to create a Bose-Einstein condensate of metastable (2 3S1) helium. The 2 ;{3}P_{1}-1 1S0 transition rate is measured directly from the decay rate of the cold atomic cloud following 1083 nm laser excitation from the 2 3S1 to the 2 3P1 state, and from accurate knowledge of the 2 3P1 population. The value obtained is 177+/-8 s;{-1}, which agrees very well with theoretical predictions, and has an accuracy that compares favorably with measurements for the same transition in heliumlike ions higher in the isoelectronic sequence.

Experimental Determination of the Helium 2 ;{3}P_{1}-1 1S0 Transition Rate. Publishing Authors By Initials

RG Dall,KG Baldwin,LJ Byron,AG Truscott,

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Experimental Determination of the Helium 2 ;{3}P_{1}-1 1S0 Transition Rate. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Physical review letters

VOLUME: 100

Page Numbers: 023001

Journal Abbreviation: Phys. Rev. Lett.

ISSN: 0031-9007

DAY: 15

MONTH: 01

YEAR: 2008

Experimental Determination of the Helium 2 ;{3}P_{1}-1 1S0 Transition Rate. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Experimental Determination of the Helium 2 ;{3}P_{1}-1 1S0 Transition Rate.

AFFILIATION: ARC Centre of Excellence for Quantum-Atom Optics and Research School of Physical Sciences and Engineering, The Australian National University, Canberra, ACT 0200, Australia.

Country: United States

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MEDLINETA: Phys Rev Lett

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