Magnetic trapping of metastable ${}^3{P}_2$ atomic strontium

Abstract

We report the magnetic trapping of metastable ${}^3{P}_2$ atomic strontium. Atoms are cooled in a magneto-optical trap (MOT) operating on the dipole allowed ${}^1{S}_0{-}^1{P}_1$ transition at 461 nm. Decay via ${}^1{P}_1\to {}^1{D}_2\to {}^3{P}_2$ continuously loads a magnetic trap formed by the quadrupole magnetic field of the MOT. Over $10^8$ atoms at a density of $8\times 10^9$ cm${}^{-3}$ and temperature of 1 mK are trapped. The atom temperature is significantly lower than what would be expected from the kinetic and potential energy of atoms as they are transferred from the MOT. This suggests that thermalization and evaporative cooling are occurring in the magnetic trap.

This paper has been accepted by PRA

References in corpus (4)

• Creation of an Ultracold Neutral Plasma
• Continuous loading of a magnetic trap
• On the feasibility of cooling and trapping metastable alkaline-earth atoms
• Calculations of collisions between cold alkaline earth atoms in a weak laser field

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