Energy Dependence of Quasifree Scattering in Deuteron Breakup by Protons

Abstract

The quasifree scattering process (QFS) has been studied in the reaction $\mathrm{D}(p, 2p)n$ at incident energies of 14, 17, 20, 23, 33, 38, 45, and 57 MeV at ${\theta }_{\mathrm{L}}={\theta }_{\mathrm{R}}=43\mathrm{}°$ (left and right) to the incident beam and ${\theta }_{\mathrm{LR}}=180\mathrm{}°$. The QFS peak cross section remains almost constant from 20 to 100 MeV and begins to drop at lower energies. The magnitude of the cross section, as well as the shape of the QFS peak, is compared with predictions of a modified-simple-impulse-approximation calculation including a cutoff radius. The energy dependence of the QFS peak cross section is compared with the corresponding cross sections of the reaction $\mathrm{D}(p, pn)p$ and to the free nucleon-nucleon elastic scattering cross sections.