Double photodetachment in He −: Feshbach and triply excited resonances

We have investigated with unprecedented levels of detail K-shell photodetachment of metastable 1s2s2p 4P He − using a merged photon-ion beam apparatus. Our recent investigation allowed the first absolute cross-section measurement of the 2s2p 2 4P Feshbach resonance by way of a resonant simultaneous...

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Bibliographic Details
Published in:Journal of electron spectroscopy and related phenomena 2005-06, Vol.144 (Complete), p.19-21
Main Authors: Berrah, N., Bilodeau, R.C., Bozek, J.D., Turri, G., Ackerman, G.D.
Format: Article
Language:English
Subjects:
Double-Auger
Photodetachment
Triply excited states
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Summary:We have investigated with unprecedented levels of detail K-shell photodetachment of metastable 1s2s2p 4P He − using a merged photon-ion beam apparatus. Our recent investigation allowed the first absolute cross-section measurement of the 2s2p 2 4P Feshbach resonance by way of a resonant simultaneous double Auger decay of unprecedented strength. In addition, higher resolution absolute cross-section measurements of triply excited resonances giving rise to hollow He − ion allowed a more stringent comparison with four different calculations.
ISSN:0368-2048
1873-2526
DOI:10.1016/j.elspec.2005.01.066