Differential cross sections for a$ elastic scattering from 60" to 175" center of momentum ( c n . ) were measured at 3.43, 4.50, 5.75, and 6.60 GeV/c incident deuteron momentum. The measurements were made with a two-arm magnetic spectrometer, making use of multiwire proportional chamber detectors. The deuterons were accelerated at the Bevatron of the Lawrence Berkeley Laboratory. Data are compared with predictions of the baryon-pickup model and the one-pion-exchange model. The backward dip at 180" c.m. for 4.5 GeV/c, predicted by Craigie and Wilkin using the one-pion-exchange model, is'not observed, but reasonable fits to the momentum variation and angular distributions are found. When the data are plotted against the variable A of the baryon-pickup model, the s dependence is greatly reduced.

Cross sections for the production of "C in C targets were measured using ' C ions with energies of 0.40, 1.05, and 2.1 GeV/nucleon. These measurements were undertaken for the purpose of establishing primary standards for use as beam monitors. Annihilation radiation from "C(T&/2 --20. 34 min) was counted using a large volume NaI detector. Cross sections of 63.5+0.5, 57.4+0.4, and 60.9+0.6 mb, respectively, were obtained for 0.40, 1.05, and 2.1 GeV/nucleon ' C beams. The results are compared with earlier measurements of the cross sections in C targets using relativistic proton and a beams. Good agreement is found between the cross sections measured in this work and a simple Glauber theory.

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