Investigation of the increased accuracy order difference schemes for the scattering problem at the quasi-uniform mesh

An iteration algorithm for solving the scattering problem is proposed, such that uses the increased accuracy order difference schemes at the quasi-uniform mesh. The dependence of calculated phase shifts on the quasi-uniform mesh structure is investigated. The borders of the increased accuracy order difference schemes application in the scattering problem is defined. The calculation of the location and the width of the 1P0(2.1)0+H- form resonance is executed with the help of the present algorithm. 5 refs.; 7 figs.; 2 tabs