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Sub-Doppler Laser Cooling of Thulium Atoms in a Magneto-optical Trap | | D. Sukachev
; A. Sokolov
; K. Chebakov
; A. Akimov
; S. Kanorsky
; N. Kolachevsky
; V. Sorokin
; | | Date: |
24 Dec 2010 | | Abstract: | We have experimentally studied sub-Doppler laser cooling in a magneto-optical
trap for thulium atoms working at the wavelength of 410.6,nm. Without any
dedicated molasses period of sub-Doppler cooling, the cloud of $3 imes 10^6$
atoms at the temperature of 25(5),$mu$K was observed. The measured
temperature is significantly lower than the Doppler limit of 240$mu$K for the
cooling transition at 410.6,nm. High efficiency of the sub-Doppler cooling
process is due to a near-degeneracy of the Land’e-$g$ 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.} | | Source: | arXiv, 1012.5433 | | Services: | Forum | Review | PDF | Favorites | |
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