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Experimental determination of the helium 2 3P1-1 1S0 transition rate

Dall, Robert; Byron, Lesa; Truscott, Andrew; Baldwin, Kenneth

Description

We present the first experimental determination of the 2 3P1–1 1S0 transition rate in helium and compare this measurement with theoretical quantum-electrodynamic predictions. The experiment exploits the very long (∼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 3P1–1 1S0 transition rate is measured directly from the decay rate of the cold atomic cloud following 1083 nm laser...[Show more]

dc.contributor.authorDall, Robert
dc.contributor.authorByron, Lesa
dc.contributor.authorTruscott, Andrew
dc.contributor.authorBaldwin, Kenneth
dc.date.accessioned2009-09-16T03:56:07Z
dc.date.accessioned2010-12-20T06:04:33Z
dc.date.available2009-09-16T03:56:07Z
dc.date.available2010-12-20T06:04:33Z
dc.date.created15/01/2008
dc.identifier.citationPhysical Review Letters 100.2 (2008): 023001/1-4
dc.identifier.issn0031-9007 1079-7114
dc.identifier.urihttp://hdl.handle.net/10440/855
dc.description.abstractWe present the first experimental determination of the 2 3P1–1 1S0 transition rate in helium and compare this measurement with theoretical quantum-electrodynamic predictions. The experiment exploits the very long (∼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 3P1–1 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.
dc.format.extent4 pages
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherAmerican Physical Society
dc.rightsThe American Physical Society
dc.sourcePhysical Review Letters
dc.source.urihttp://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000100000002023001000001&idtype=cvips&gifs=Yes
dc.subjectKeywords: Electrodynamics; Metastable phases; Quantum electronics; Transition metals; Experimental determination; Isoelectronic sequence; Helium
dc.titleExperimental determination of the helium 2 3P1-1 1S0 transition rate
dc.typeJournal article
local.description.notesCorrected 17 January 2008. Corrections published as Publisher's Note, PRL 100.3 (2008): 039901
local.identifier.citationvolume100
dc.date.issued2008
local.identifier.absfor020201 - Atomic and Molecular Physics
local.identifier.ariespublicationu4169254xPUB162
local.type.statusPublished Version
local.contributor.affiliationDall, Robert, Research School of Physical Sciences and Engineering, Atomic and Molecular Physics Laboratories
local.contributor.affiliationBaldwin, Kenneth, Research School of Physical Sciences and Engineering, Atomic and Molecular Physics Laboratories
local.contributor.affiliationByron, Lesa, Research School of Physical Sciences and Engineering, Atomic and Molecular Physics Laboratories
local.contributor.affiliationTruscott, Andrew, Research School of Physical Sciences and Engineering, Atomic and Molecular Physics Laboratories
local.bibliographicCitation.issue2
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage4
local.identifier.doiPhysRevLett.100.023001
dc.date.updated2015-12-09T07:17:39Z
local.identifier.scopusID2-s2.0-38349141835
local.identifier.thomsonID000252471200025
dcterms.accessRightsOpen Access
dc.provenancehttp://www.sherpa.ac.uk/romeo/index.php "Author can archive pre-print (ie pre-refereeing) … post-print (ie final draft post-refereeing) … [and] publisher's version/PDF. Link to publisher version … [and] Copyright notice required. Publisher's version/PDF can be used on … employers web site." - from SHERPA/RoMEO site (as at 25/02/10). ©2008 The American Physical Society
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