Twophoton detachment of H^{}
Abstract
A precision calculation of the twophoton detachment cross section for H^{} is performed by means of a nonHermitian Floquet theory. A highly accurate initial state wave function is used along with fully correlated saddlepoint wave functions for the intermediate and final states. The cross section is investigated for energies below the n=2 and n=3 thresholds. The peak cross section predicted for the ^{1}D resonance is 3.10×10^{49} cm^{4} sec at 10.873 2 eV. It represents an ab initio theoretical prediction in complete agreement with the experimental result of 3.2 (+1.8,1.2)×10^{49} cm^{4} sec at 10.873 2(27) eV.
 Publication:

Physical Review A
 Pub Date:
 June 2000
 DOI:
 10.1103/PhysRevA.61.060702
 Bibcode:
 2000PhRvA..61f0702C
 Keywords:

 32.80.Gc;
 32.30.r;
 32.70.n;
 32.80.Dz;
 Photodetachment of atomic negative ions;
 Atomic spectra;
 Intensities and shapes of atomic spectral lines;
 Autoionization