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Collisional properties of sympathetically cooled $^{39}$K

L. De Sarlo·P. Maioli·G. Barontini·J. Catani·F. Minardi·M. Inguscio
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Abstract

We report the experimental evidence of the sympathetic cooling of $^{39}$K with $^{87}$Rb down to 1 $μ$K, obtained in a novel tight confining magnetic trap. This allowed us to perform the first direct measurement of the elastic cross section of $^{39}$K below 50 $μ$K. The result obtained for the triplet scattering length, $a_T = -51(7)$ Bohr radii, agrees with previous results derived from photoassociation spectra and from Feshbach spectroscopy of $^{40}$K.

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L. De Sarlo, P. Maioli, G. Barontini, J. Catani, F. Minardi, M. Inguscio. 2007-01-03. Collisional properties of sympathetically cooled $^{39}$K. https://arxiv.org/abs/cond-mat/0701051

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