Sub-doppler laser cooling of thulium atoms in a magneto-optical trap
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Sub-Doppler laser cooling in a magneto-optical trap for thulium atoms at a wavelength of 410.6 nm has been experimentally studied. Without any dedicated molasses period of sub-Doppler cooling, the cloud of 3 10 6 atoms at a temperature of 25(5) K was observed. The measured temperature is significantly lower than the Doppler limit of 240 K for the cooling transition at 410.6 nm. The high efficiency of the sub-Doppler cooling process is due to a near-degeneracy of the Land g-factors of the lower 4f 13 6s 2 (J = 7/2) and the upper 4f 12 5d 3/2 6s 2 (J = 9/2) cooling levels. 2010 Pleiades Publishing, Ltd.
author list (cited authors)
Sukachev, D., Sokolov, A., Chebakov, K., Akimov, A., Kolachevsky, N., & Sorokin, V.
complete list of authors
Sukachev, D||Sokolov, A||Chebakov, K||Akimov, A||Kolachevsky, N||Sorokin, V