Measurement of theH2(p,2p)nReaction over a Large Volume of Phase Space

Abstract

A kinematically complete measurement of the deuteron breakup cross section has been made using a 39.5-MeV proton beam. The cross section was simultaneously measured at approximately 2000 angle pairs chosen to uniformly sample the entire phase-space volume available to the two protons. A portion of the data in the form of a partial Dalitz plot is compared with a simple model calculation. In the model, the breakup cross section is expressed as an incoherent sum of terms to separately represent the dependence of the cross section on statistical processes, $pp$ quasifree scattering, and nucleon-nucleon final-state interactions. The model calculation does not reproduce the minimum in the partial Dalitz plot, consistent with the previously published hypothesis that the minimum is due to a destructive interference effect. The results of the model calculation are also compared with spectra at a representative set of individual angle pairs.