title: Calculations of partial cross sections for photofragmentation processes using complex absorbing potentials.
abstract: We investigate the use of complex absorbing potentials for the calculation of partial cross sections in multichannel photofragmentation processes. An exactly solvable, coupled-two-channel problem involving square-well potentials is used to compare the performance of various types of absorbing potentials. Special emphasis is given to the near-threshold regions and the conditions under which the numerical results are able to reproduce the Wigner threshold laws. It was found that singular, transmission-free absorbing potentials perform better than those of power or polynomial form.
authors.affiliation: Institute of Physics, P.O. Box 57, 11001 Belgrade, Serbia and Montenegro. tasko@phy.bg.ac.yu
authors.forename: T P
authors.initials: TP
authors.lastname: Grozdanov
authors.forename: L
authors.initials: L
authors.lastname: Andric
authors.forename: R
authors.initials: R
authors.lastname: McCarroll