Total and differential elastic cross-section data are presented at eight incident ${\pi }^{+}$ momenta: 1.28, 1.34, 1.40, 1.43, 1.55, 1.68, 1.77, and 1.84 $\frac{\mathrm{GeV}}{c}$. These data were obtained from a hydrogen-bubble-chamber exposure at the Bevatron, and contain more than 65 000 events. This represents more than 1½ times the world's data hitherto available in this energy region.

• Received 18 September 1970

DOI:https://doi.org/10.1103/PhysRevD.4.676