Abstract
The analytic properties of the Jost function or Fredholm determinant for single- and many-channel scattering problems suggest that they may often be less rapidly varying functions of the energy than the matrix or cross sections. This idea is combined with a pointwise rational-fraction interpolation to give a rapidly convergent and highly accurate method of interpolating scattering information over a continuous range of energies. Narrow resonances are easily found by examination of the zeros of the real part of the Fredholm determinant.
- Received 7 September 1971
DOI:https://doi.org/10.1103/PhysRevA.5.757
©1972 American Physical Society