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Suppression of Penning ionization in a spin-polarized mixture of rubidium and He

Byron, Lesa; Dall, Robert; Wu, Ju-Kuei (Rugway); Truscott, Andrew

Description

This paper presents the first study of the collision dynamics of an ultra-cold spin-polarized mixture of rubidium and metastable helium (He*) atoms. Our experiment monitors ion production from the mixture for both magnetically polarized and unpolarized cases. In the unpolarized case, we observe an increase in our background ion rate. However, in the completely polarized sample the ion production is below the sensitivity of our experiment. Nonetheless, we determine an upper limit of 5 × 10-12 cm...[Show more]

dc.contributor.authorByron, Lesa
dc.contributor.authorDall, Robert
dc.contributor.authorWu, Ju-Kuei (Rugway)
dc.contributor.authorTruscott, Andrew
dc.date.accessioned2015-12-07T22:42:38Z
dc.identifier.issn1367-2630
dc.identifier.urihttp://hdl.handle.net/1885/24628
dc.description.abstractThis paper presents the first study of the collision dynamics of an ultra-cold spin-polarized mixture of rubidium and metastable helium (He*) atoms. Our experiment monitors ion production from the mixture for both magnetically polarized and unpolarized cases. In the unpolarized case, we observe an increase in our background ion rate. However, in the completely polarized sample the ion production is below the sensitivity of our experiment. Nonetheless, we determine an upper limit of 5 × 10-12 cm 3 s-1 for the polarized rate constant (β Rb-He*), which is two orders of magnitude below the unpolarized rate constant. Such a suppression of the He*-87Rb polarized rate was not apparent a priori and opens the intriguing possibility of creating a dual Bose-Einstein condensate comprising an alkali ground-state atom and an excited-state noblegas atom.
dc.publisherInstitute of Physics Publishing
dc.sourceNew Journal of Physics
dc.subjectKeywords: Apriori; Bose-Einstein condensates; Collision dynamics; Ground-state atoms; Ion production; Ion rates; Metastable helium; Orders of magnitude; Penning ionization; Spin-polarized; Ultra-cold; Upper limits; Atoms; Helium; Ions; Mixtures; Rate constants; Sta
dc.titleSuppression of Penning ionization in a spin-polarized mixture of rubidium and He
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume12
dc.date.issued2010
local.identifier.absfor020201 - Atomic and Molecular Physics
local.identifier.ariespublicationu4860843xPUB33
local.type.statusPublished Version
local.contributor.affiliationByron, Lesa, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationDall, Robert, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationWu, Ju-Kuei (Rugway), College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationTruscott, Andrew, College of Physical and Mathematical Sciences, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.issue013004
local.bibliographicCitation.startpage8
local.identifier.doi10.1088/1367-2630/12/1/013004
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2016-02-24T11:24:48Z
local.identifier.scopusID2-s2.0-75749130726
local.identifier.thomsonID000273568800001
CollectionsANU Research Publications

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