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Abstract
The pion-nucleus elastic scattering cross sections are calculated and compared to the data of pion scattering on 28Si, 58Ni, 208Pb at energies 162 and 291 MeV by using two kinds of the microscopic optical potentials (OPs). The first one is the folding OP, where the known nuclear density distributions are used while parameters of the elementary pion-nucleon amplitude of scattering are fitted to the data with the aim to estimate the in-medium effect, when pions are scattered not on the free but on the nuclear bounded nucleons. The analysis given when calculations are made using the local Kisslinger type OP, whose parameters are fitted to the data. The cross sections for both OPs are obtained by solving the Klein-Gordon wave equation. The role of a surface region of potentials is discusses.
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Details
1 Joint Institute for Nuclear Research, Dubna, Russia; Dubna State University, Dubna 141980, Russia
2 Joint Institute for Nuclear Research, Dubna, Russia
3 Cairo University, Giza, Cairo, Egypt