Theoretical evaluation of neutron-nucleus scattering parameters from experimental data in 6 ≤ A ≤ 60 region

The results of the systematic calculations of the neutron-nucleus scattering parameters at energies < 2 keV performed for 37 isotopes (from 6 Li up to 59 Co) in the mass region 6 ≤ A ≤ 60 using the large compilation of experimental data obtained in Garching are discussed. The s-wave potential scattering radius, the scattering lengths and the bound state parameters are calculated by the method based on simultaneous minimization of general least square fit expressions for the experimental and theoretical values of the total cross sections at different energies, absorption cross sections and the coherent scattering lengths. The theoretical expressions for these parameters are deduced on the basis of usual S matrix formalism, no assumption about the particular shape of the optical model potential is made at this stage. The spherical Fiedeldey-Frahn optical potential is employed for the pure theoretical description or the above mentioned neutron-nucleus scattering characteristics