Analyzing power of proton-nucleus elastic scattering between 80 and 180 MeV

Abstract

Elastic scattering of polarized protons of 80-180 MeV from a number of target nuclei ($24<A<208$) has been measured. The systematic energy and target mass dependence of the cross section and analyzing power angular distributions is discussed. The data have been analyzed within the framework of a conventional optical potential model, and the behavior of the potential parameters as a function of energy is investigated. Comparisons are made with results obtained at energies greater than 180 MeV and with predictions obtained from microscopic models.NUCLEAR REACTIONS $^{24}\mathrm{Mg}(\stackrel{\ensuremath{\rightarrow}}{p}, p)$, ${E}_{p}=134.7$ MeV; $^{28}\mathrm{Si}(\stackrel{\ensuremath{\rightarrow}}{p}, p)$, ${E}_{p}=134.5$ MeV; $^{40}\mathrm{Ca}(\stackrel{\ensuremath{\rightarrow}}{p}, p)$, ${E}_{p}=80.2, 181.5$ MeV; $^{90}\mathrm{Zr}(\stackrel{\ensuremath{\rightarrow}}{p}, p)$, ${E}_{p}=79.6, 98.7, 134.8, 160$ MeV; $^{92}\mathrm{Zr}(\stackrel{\ensuremath{\rightarrow}}{p}, p)$, ${E}_{p}=104$ MeV; $^{120}\mathrm{Sn}(\stackrel{\ensuremath{\rightarrow}}{p}, p)$, ${E}_{p}=104$ MeV; $^{208}\mathrm{Pb}(\stackrel{\ensuremath{\rightarrow}}{p}, p)$, ${E}_{p}=79.8, 98, 182$ MeV; measured $\ensuremath{\sigma}(\ensuremath{\theta})$, ${A}_{y}(\ensuremath{\theta})$; optical-model analysis, deduced energy dependence, comparison with microscopic models.