Proton scattering from C 12 between 120 and 200 MeV and the optical potential
1983; American Institute of Physics; Volume: 27; Issue: 2 Linguagem: Inglês
10.1103/physrevc.27.459
ISSN1538-4497
AutoresH. O. Meyer, P. Schwändt, W. W. Jacobs, J. R. Hall,
Tópico(s)Advanced Chemical Physics Studies
ResumoCross sections and analyzing powers are presented for $^{12}\mathrm{C}(\stackrel{\ensuremath{\rightarrow}}{p}, p)^{12}\mathrm{C}$ elastic scattering at 122 and 160 MeV. The data cover a large angular range (up to ${\ensuremath{\theta}}_{\mathrm{lab}}=154\ifmmode^\circ\else\textdegree\fi{}$) and extend to lower energies an earlier, similar measurement at 200 MeV. The complete data set is analyzed in the framework of the optical model. Besides the standard Woods-Saxon potential, nonstandard radial shapes for the central and the spin-orbit potentials are investigated. Although the number of free parameters for the nonstandard potential is substantially reduced from the standard potential, it provides an improved fit to the data and a description of $^{12}\mathrm{C}(p, p)^{12}\mathrm{C}$ scattering with a simple monotonic energy dependence in the region 100-200 MeV. The characteristic features of the nonstandard potential are reproduced by microscopic theories.NUCLEAR REACTIONS $^{12}\mathrm{C}(\stackrel{\ensuremath{\rightarrow}}{p}, p)$, ${E}_{p}=122, 160$ MeV, ${\ensuremath{\theta}}_{\mathrm{lab}}=6\ifmmode^\circ\else\textdegree\fi{}\ensuremath{-}154\ifmmode^\circ\else\textdegree\fi{}$; measured $\ensuremath{\sigma}(\ensuremath{\theta})$ and $A(\ensuremath{\theta})$; optical-model analysis, including data at 200 MeV, nonstandard potential shapes, energy dependence of optical potential.
Referência(s)