Zeeman Relaxation of Cold Atomic Iron and Nickel in Collisions with \(^3\)He

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Zeeman Relaxation of Cold Atomic Iron and Nickel in Collisions with \(^3\)He

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dc.contributor.author Johnson, Cort
dc.contributor.author Newman, Bonna
dc.contributor.author Brahms, Nathan
dc.contributor.author Doyle, John M.
dc.contributor.author Kleppner, Daniel
dc.contributor.author Greytak, Thomas J.
dc.date.accessioned 2012-06-12T17:52:11Z
dc.date.issued 2010
dc.identifier.citation Johnson, Cort, Bonna Newman, Nathan Brahms, John M. Doyle, Daniel Kleppner, and Thomas J. Greytak. 2010. Zeeman relaxation of cold atomic iron and nickel in collisions with \(^3\)He. Physical Review A 81(6): 062706. en_US
dc.identifier.issn 1050-2947 en_US
dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:8866870
dc.description.abstract We have measured the ratio γ of the diffusion cross section to the angular momentum reorientation cross section in the colliding Fe-\(^3\)He and Ni-\(^3\)He systems. Nickel (Ni) and iron (Fe) atoms are introduced via laser ablation into a cryogenically cooled experimental cell containing cold (<1 K) \(^3\)He buffer gas. Elastic collisions rapidly cool the translational temperature of the ablated atoms to the \(^3\)He temperature. γ is extracted by measuring the decays of the atomic Zeeman sublevels. For our experimental conditions, thermal energy is comparable to the Zeeman splitting. As a result, thermal excitations between Zeeman sublevels significantly impact the observed decay. To determine γ accurately, we introduce a model of Zeeman state dynamics that includes thermal excitations. We find γ\(_{Ni-^{3}He}=5×10^3\) and γ\(_{Fe-^{3}He}\leq3×10^3\) at 0.75 K in a 0.8 T magnetic field. These measurements are interpreted in the context of submerged shell suppression of spin relaxation, as studied previously in transition metals and rare earth atoms. en_US
dc.description.sponsorship Physics en_US
dc.language.iso en_US en_US
dc.publisher American Physical Society en_US
dc.relation.isversionof doi:10.1103/PhysRevA.81.062706 en_US
dc.relation.hasversion dspace.mit.edu/openaccess-disseminate/1721.1/60905 en_US
dash.license OAP
dc.title Zeeman Relaxation of Cold Atomic Iron and Nickel in Collisions with \(^3\)He en_US
dc.type Journal Article en_US
dc.description.version Accepted Manuscript en_US
dc.relation.journal Physical Review A en_US
dash.depositing.author Doyle, John M.
dc.date.available 2012-06-12T17:52:11Z

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  • FAS Scholarly Articles [6902]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University

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