Differential cross sections for proton elastic scattering from 42,44,48Ca have been measured at seven energies in the laboratory energy range from 21.0 to 48.4 MeV, and for Ca40 at six energies between 25.0 and 45.0 MeV. Measurements were made at 2.5°intervals from 10°to 90°(laboratory angles), and at 5.0°intervals between 90°and 170°. Relative errors in the data are typically between 3% and 4%; the scale errors are also 3%. The data have been analyzed by both nonrelativistic and relativistic optical models. The optical potential parameters were used to calculate nuclear matter radius information for the calcium isotopic series, which is compared to previous results.@en

A polarized He3 target, which uses conventional optical pumping with He4 discharge lamps, has been used for the measurement of He3 analyzing powers Ay(θ) at energies of 25.0, 30.0, 32.5, and 35.0 MeV. The statistical uncertainties in the data are on the order of 0.03; the systematic uncertainty is estimated to be 0.05. These data are compared with fits and predictions from various phase shift analyses.@en

A polarized 3He target, which uses conventional optical pumping with 4He discharge lamps, is described. Emphasis is given to the experience gained with its use during nuclear scattering experiments using proton beams from the University of Manitoba cyclotron. An analysis of possible errors in present and past experiments is given.@en