On the feasibility of cooling and trapping metastable alkaline-earth atoms

Details On the feasibility of cooling and trapping metastable alkaline-earth atoms On the feasibility of cooling and trapping metastable alkaline-earth atoms

2001-05-10

arxiv.org/abs/physics/0105030v1

Phys. Rev. Lett. 87, 023002 (2001)

Physics

Atomic Physics

8 pages, 2 figures; to appear in PRL

Scientific paper

10.1103/PhysRevLett.87.023002

Metastability and long-range interactions of Mg, Ca, and Sr in the lowest-energy metastable $^3P_2$ state are investigated. The calculated lifetimes are 38 minutes for Mg*, 118 minutes for Ca*, and 17 minutes for Sr*, supporting feasibility of cooling and trapping experiments. The quadrupole-quadrupole long-range interactions of two metastable atoms are evaluated for various molecular symmetries. Hund's case (c) 4_g potential possesses a large 100-1000 K potential barrier. Therefore magnetic trap losses can possibly be reduced using cold metastable atoms in a stretched M=2 state. Calculations were performed in the framework of ab initio relativistic configuration interaction method coupled with the random-phase approximation.

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