Recoil Study of theZn68(p,2p)Cu67Reaction

Abstract

The excitation function and the product recoil behavior of the ${\mathrm{Zn}}^{68}\mathrm{}(p,2p)\mathrm{}{\mathrm{Cu}}^{67}$ reaction was studied using incident protons of energy between 80 and 430 MeV. The thick-target thick-catcher technique was used in which effective recoil ranges were measured in the forward, backward, and transverse directions. The data were interpreted in terms of the knock-out mechanism. The data were also fitted to a recoil velocity distribution written in terms of a power series in the cosine of the scattering angle. Ranges calculated by this treatment are consistent with the interpretation that the reaction proceeds mainly by the knock-out mechanism. Reasonable agreement was obtained between the recoil kinetic energy, calculated on the basis of the assumed recoil velocity distribution, and that which would be obtained from an abrupt removal of a proton from the top of the nuclear well in ${\mathrm{Zn}}^{68}$.