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Sub-Doppler cooling of fermionic Hg isotopes in a magneto-optical trap

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Abstract

Laser cooling and trapping of neutral mercury is performed in a single-stage S01P13 3D magneto-optical trap. We give a detailed account of the atom cloud size and temperature for both bosonic (Hg200 and Hg202) and fermionic (Hg199 and Hg201) isotopes. The bosonic isotope temperatures are in close agreement with Doppler cooling theory, while temperatures obtained for the fermionic isotopes are lower, suggesting the presence of sub-Doppler cooling. A minimum temperature of 29±4μK is achieved for Hg201.

© 2010 Optical Society of America

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