Enhanced cooling of hydrogen by a buffer gas of alkali-metal atoms

 
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Derevianko, A.
Côté, R.
Dalgarno, A.
Jeung, G.-H.
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https://doi.org/10.1103/PhysRevA.64.011404
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Derevianko, A., R. Côté, A. Dalgarno, and G.-H. Jeung. 2001. “Enhanced Cooling of Hydrogen by a Buffer Gas of Alkali-Metal Atoms.” Physical Review A 64 (1). https://doi.org/10.1103/physreva.64.011404.
Abstract
We consider the possibility of enhanced cooling of hydrogen atoms by a buffer gas of alkali-metal atoms Na, K, Rb, and Cs. Ultracold elastic collision cross sections for the Na-H and Rb-H purely spin-polarized pairs are found to be 640 and 860 times larger than that for the H-H pair, respectively. From an analysis of the techniques of production of ultracold sodium and rubidium samples, it seems feasible that the critical conditions for Bose-Einstein condensation of hydrogen could be achieved already at the stage of optical cooling of the sodium or rubidium buffer gas.
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http://nrs.harvard.edu/urn-3:HUL.InstRepos:41417411

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