Title

Hybrid spin-exchange optical pumping of He-3

Abstract

We demonstrate spin-exchange optical pumping of He-3 using a "hybrid" K-Rb vapor mixture. The Rb atoms absorb light from a standard laser at 795 nm, then collisionally polarize the potassium atoms. Spin-exchange collisions of K and He-3 atoms then transfer the angular momentum to the He-3 with much greater efficiency than Rb-He-3. For a K-rich vapor, the efficiency of the hybrid spin-exchange collisions approaches 1/4, an order of magnitude greater than achieved by pure Rb pumping. We present the first measurements of actual photon efficiencies (polarized nuclei produced per absorbed photon), and show that a new parasitic absorption process limits the total efficiencies for both hybrid and pure Rb pumping.

Department

Physics

Publication Date

9-16-2003

Journal Title

Physical Review Letters

Publisher

AMERICAN PHYSICAL SOCIETY

Digital Object Identifier (DOI)

10.1103/PhysRevLett.91.123003

Document Type

Article

Rights

© 2003 The American Physical Society

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