A (p,2p) experiment was carried out at 2.1 GeV to search for interactions between the incident proton and a fast dinucleon constituent inside the target nucleus. The results of this experiment along with a Two-Armed Spectrometer System used to make these coincidence measurements are described. Data are presented that indicate a possible contribution to the backscattered proton spectrum from such a dinucleon structure, although effects of statistics and experimental resolution allow only an upper limit to be set on the magnitude of this contribution. Effects of phase space, Fermi motion, and final state interactions on these measurements are discussed. A comparison with an intranuclear cascade model is shown. The systematics of other two-particle coincidence spectra obtained in this experiment are also presented.

• Received 20 December 1983

DOI:https://doi.org/10.1103/PhysRevC.30.616