Threshold-related enhancement of the high-energy plateau in above-threshold detachment |
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Authors: | Borca Bogdan Frolov M V Manakov N L Starace Anthony F |
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Affiliation: | Department of Physics and Astronomy, The University of Nebraska, Lincoln, Nebraska 68588-0111, USA. |
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Abstract: | 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. |
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