Experiments with 315-Mev Polarized Protons Elastic Scattering byComplex Nuclei

In this paper we descr ibe experiments with high-energy polarized protons, ( * 3 15 Mev), their production, and their scattering f rom complex nuclei. We give the essent ials of the theory of polarization of par t ic les of spin 1/2 in a form suitable to the interpretation of the experimental resu l t s . Included i s a detailed description of the experimental techniques, the charac ter i s t ics of the polarized beam, and a discussion of the e r r o r s of measurement . The beam was 76% polarized and the maximum beam current was approximately 10 5 protons per second. Results of the scattering experiments on beryllium, carbon, aluminum, calcium, iron, and tantalum a r e descr ibed. Some resu l t s of tr iple -scat ter ing experiments, which further determine the scattering mat r ix , a r e a l so given, The relation to the experimental resu l t s of the various, theories proposed for explaining the polarization by scat ter ing i s discussed. Only qualitative agreement with the theoretical studies made on current models is achieved. Although many of the features predicted by the usual type of potentials a r e present , no single potential can account for all the observed facts .