Photodetachment Cross Section of He ? (1s2s2p 4 P O ) in the Region of the 1s Detachment Threshold
نویسنده
چکیده
Using a Spline-Garlekin and Inverse Iteration method, we studied in detail the photodetachment cross section of the He ? (1s2s2p 4 P o) state in the region of the 1s detachment threshold. Details of the cross section from threshold to 44 eV are presented. EEects of core excitation and continuume channel coupling are studied. A very narrow 2s3s4s 4 S resonance was found at 42.86603 eV with a width of 0.1 meV. Other resonance structures are also found and analyzed. We studied the 2s2p 2 4 P resonance state which lies immediately below the 1s threshold. The width and position of this state, obtained from this calculation, are 37.6681 eV and 9.849 meV, respectively. This result is in good agreement with other theoretical calculations.
منابع مشابه
9 A pr 1 99 8 Photodetachment study of He − quartet resonances below the He ( n = 3 ) thresholds
The photodetachment cross section of He has been measured in the photon energy range 2.9 . . . 3.3 eV in order to investigate doubly excited states. Measurements were made channel specific by selectively detecting the residual He atoms left in a particular excited state following detachment. Three Feshbach resonances were found in the He(1s2p P)+e(ǫp) partial cross section: a S resonance below ...
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