Proton-Proton Polarization at 16 Mev

The proton-proton polarization has been measured at 16.2±{}0.2 Mev and 25 degrees in the laboratory system, using the familiar double-scattering method, with hydrogen gas as second scatterer. Instrumental asymmetries were practically eliminated by using carbon and copper alternately as first targets. The polarization was found to be +(0.6±{}0.5)%. Theoretical implications of the work are discussed.