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Production of nuclear-spin--polarized atoms by ''collisional pumping'' is proposed. Collisional pumping utilizes a succession of charge-transfer collisions between a fast ion or atom beam and a thick electron-spin--polarized target to polarize the beam. Calculational results are presented for 20-keV/u H or D ions or atoms incident on a polarized target. The process appears to have unique capabilities for polarizing fast H, D, T, and perhaps other nuclei, with the possibility of producing ampere currents.

Polarization of Fast Atomic Beams by "Collisional Pumping": A Proposal for Production of Intense Polarized Beams