dc.contributor.author | Tscherbul, Timur V. | |
dc.contributor.author | Klos, Jacek | |
dc.contributor.author | Dalgarno, Alexander | |
dc.contributor.author | Zygelman, Bernard | |
dc.contributor.author | Pavlovic, Zoran | |
dc.contributor.author | Hummon, Matthew T. | |
dc.contributor.author | Lu, Hsin-I | |
dc.contributor.author | Tsikata, Edem | |
dc.contributor.author | Doyle, John M. | |
dc.date.accessioned | 2011-09-22T20:22:06Z | |
dc.date.issued | 2010 | |
dc.identifier.citation | Tscherbul, 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.issn | 1050-2947 | en_US |
dc.identifier.uri | http://nrs.harvard.edu/urn-3:HUL.InstRepos:5139187 | |
dc.description.abstract | We 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.sponsorship | Astronomy | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | American Physical Society | en_US |
dc.relation.isversionof | doi:10.1103/PhysRevA.82.042718 | en_US |
dc.relation.hasversion | http://arxiv.org/abs/1007.0469 | en_US |
dash.license | LAA | |
dc.title | Collisional Properties of Cold Spin-Polarized Nitrogen Gas: Theory, Experiment, and Prospects as a Sympathetic Coolant for Trapped Atoms and Molecules | en_US |
dc.type | Journal Article | en_US |
dc.description.version | Version of Record | en_US |
dc.relation.journal | Physical Review A | en_US |
dash.depositing.author | Dalgarno, Alexander | |
dc.date.available | 2011-09-22T20:22:06Z | |
dc.identifier.doi | 10.1103/PhysRevA.82.042718 | * |
dash.contributor.affiliated | Lu, Hsin-I | |
dash.contributor.affiliated | Dalgarno, Alexander | |
dash.contributor.affiliated | Doyle, John | |