Threshold-related enhancement of the high-energy plateau in above-threshold detachment.
We present nonperturbative theoretical results showing a resonant-like enhancement of above-threshold detachment spectra in the region of the high-energy plateau as the laser intensity sweeps across channel thresholds. This enhancement has a pure quantum origin stemming from well-known threshold phenomena in multichannel problems whose features are clearly demonstrated in our numerical results. Similar well-known anomalies at neutral atom thresholds are expected to explain experimentally observed resonant-like enhancements of above-threshold ionization spectra.
Borca
Bogdan
B
Department of Physics and Astronomy, The University of Nebraska, Lincoln, Nebraska 68588-0111, USA.
Frolov
M V
MV
Manakov
N L
NL
Starace
Anthony F
AF