Inelastic Scattering of 18.2-MeV Protons by Deuterons

Measurements of the inelastic cross section $\frac{d^3\sigma }{d{\Omega }_{1}d{\Omega }_{2}d{E}_1}$ for breakup of deuterons by 18.2-MeV protons were made by detecting both breakup protons in coincidence. $p-d$ breakup events were identified from two-dimensional pulse-height spectra. Typical cross sections ranged from 3 mb/${\mathrm{sr}}^2$-MeV at ${\theta }_1=-{\theta }_2=15\mathrm{}°$ to 0.6 mb/${\mathrm{sr}}^2$-MeV at ${\theta }_1=-{\theta }_2=60\mathrm{}°$. The data are in substantial disagreement with the predictions of two theories based upon the impulse approximation: the zero-range theory of Frank and Gammel, and the spectator model of Kuckes, Wilson, and Cooper. Reasons for the disagreement are discussed.