Antiproton-Nucleus Elastic Scatting at Intermediate Energies

Abstract：

Using the experimental pN amplitudes and the multiple scattering theory, we obtained the antiproton potential at incident energies from 180 to 1800 MeV under the impulse approximation. We found that the imaginary parts of the optical potential strengths are nearly constant from 130 to 140 MeV. By using these optical potentials, we obtain the calculation results of the elastic scattering differential cross sections from the closed shell nuclei ¹²C, ¹⁶O, ⁴⁰Ca and ²⁰⁸Pb for five kinetic energies ranging from 180 to 1800 MeV. At 180 MeV, the experimental data are fitted very well, and the theoretical results at higher energies are predicted.