Magneto-optical trapping of barium

S. De, U. Dammalapati, K. Jungmann, L. Willmann

研究成果: Article査読

54 被引用数 (Scopus)


Laser cooling and trapping of the heavy alkaline-earth-metal element barium has been achieved based on the strong 6 s2 S1 0 -6s6p P1 1 transition. The excited state decays to a large fraction into metastable D states. Two schemes were implemented where three additional laser-driven transitions provide closed cooling cycles. This results in a fraction of 50(20)% of the trapped atoms in one of the metastable states. A total efficiency of 0.4 (1) × 10-2 for slowing a thermal atomic beam and capturing atoms into a magneto-optical trap was obtained. Trap lifetimes of more than 1.5 s were observed. They are shortened at high laser intensities by three photon photoionization losses. The developed scheme can be transferred to other systems with large leakage from the cooling transition, such as Ra which is interesting for sensitive fundamental symmetry research.

ジャーナルPhysical Review A - Atomic, Molecular, and Optical Physics
出版ステータスPublished - 2009 4月 1

ASJC Scopus subject areas

  • 原子分子物理学および光学


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