The resonance parameters of the collinear H + H-2 system, calculated r
ecently by the Lorentzian fit of Fourier spectra of the semiclassical
time correlation function C(t), are here extracted directly by harmoni
c inversion of C(t) using the filter-diagonalization technique. The ne
w approach reveals more resonances from a much shorter segment of the
same signal C(t). This reduces both the semiclassical error and the ov
erall numerical effort. (C) 1997 Elsevier Science B.V.