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Calculations of partial cross sections for photofragmentation processes using complex absorbing potentials
T P Grozdanov1, L Andric, R McCarroll
1Institute of Physics, P.O. Box 57, 11001 Belgrade, Serbia and Montenegro. tasko@phy.bg.ac.yu
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.
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