title: Multichannel scattering calculations using absorbing potentials and mapped grids.
abstract: The authors investigate the use of absorbing potentials and discrete variable representation grid methods in multichannel time-independent scattering calculations. An exactly solvable, coupled-two-channel problem involving square-well potentials is used to assess the quality of numerical results. Special emphasis is given to the description of scattering resonances and near-threshold regions. Numerical treatment of close vicinities of thresholds requires the introduction of nonequidistant grids through a mapping procedure of the scattering coordinate.
authors.affiliation: Institute of Physics, P.O. Box 57, 11001 Belgrade, Serbia.
authors.forename: T P
authors.initials: TP
authors.lastname: Grozdanov
authors.forename: R
authors.initials: R
authors.lastname: McCarroll