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dc.contributor.authorTscherbul, Timur V.
dc.contributor.authorKlos, Jacek
dc.contributor.authorDalgarno, Alexander
dc.contributor.authorZygelman, Bernard
dc.contributor.authorPavlovic, Zoran
dc.contributor.authorHummon, Matthew T.
dc.contributor.authorLu, Hsin-I
dc.contributor.authorTsikata, Edem
dc.contributor.authorDoyle, John M.
dc.date.accessioned2011-09-22T20:22:06Z
dc.date.issued2010
dc.identifier.citationTscherbul, Timur V., Jacek Klos, Alexander Dalgarno, Bernard Zygelman, Zoran Pavlovic, Matthew T. Hummon, Hsin-I Lu, Edem Tsikata, and John M. Doyle. 2010. Collisional properties of cold spin-polarized nitrogen gas: Theory, experiment, and prospects as a sympathetic coolant for trapped atoms and molecules. Physical Review A 82(4): 042718.en_US
dc.identifier.issn1050-2947en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:5139187
dc.description.abstractWe report a combined experimental and theoretical study of collision-induced dipolar relaxation in a cold spin-polarized gas of atomic nitrogen (N). We use buffer gas cooling to create trapped samples of \(^{14}\)N and \(^{15}\)N atoms with densities (5\(\pm\)2) × \(10^{12}\) \(cm^{-3}\) and measure their magnetic relaxation rates at milli-Kelvin temperatures. These measurements, together with rigorous quantum scattering calculations based on accurate \(ab\) \(initio\) interaction potentials for the \(^{7}\Sigma^{+}_{u}\) electronic state of \(N_{2}\) demonstrate that dipolar relaxation in N+N collisions occurs at a slow rate of ~\(10^{-13}\) \(cm^{3}\)/s over a wide range of temperatures (1 mK to 1 K) and magnetic fields (10 mT to 2 T). The calculated dipolar relaxation rates are insensitive to small variations of the interaction potential and to the magnitude of the spin-exchange interaction, enabling the accurate calibration of the measured N atom density. We find consistency between the calculated and experimentally determined rates. Our results suggest that N atoms are promising candidates for future experiments on sympathetic cooling of molecules.en_US
dc.description.sponsorshipAstronomyen_US
dc.language.isoen_USen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionofdoi:10.1103/PhysRevA.82.042718en_US
dc.relation.hasversionhttp://arxiv.org/abs/1007.0469en_US
dash.licenseLAA
dc.titleCollisional Properties of Cold Spin-Polarized Nitrogen Gas: Theory, Experiment, and Prospects as a Sympathetic Coolant for Trapped Atoms and Moleculesen_US
dc.typeJournal Articleen_US
dc.description.versionVersion of Recorden_US
dc.relation.journalPhysical Review Aen_US
dash.depositing.authorDalgarno, Alexander
dc.date.available2011-09-22T20:22:06Z
dc.identifier.doi10.1103/PhysRevA.82.042718*
dash.contributor.affiliatedLu, Hsin-I
dash.contributor.affiliatedDalgarno, Alexander
dash.contributor.affiliatedDoyle, John


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