(e, 2e) Experiments on cadmium autoionizing levels
We have extended our previous experimental investigations of coherent excitation, by electron impact, of Cd J = 0, 1, 2 autoionizing levels. The use of a position sensitive detector, in the ejected-electron channel, has led to higher count rates and a greatly improved energy resolution of 0.04 eV. The new data collection system permits the simultaneous acquisition of both ejected-electron and (e, 2e) energy spectra. The non-coincident spectra are used to normalize and align, with high accuracy, (e, 2e) spectra taken at ejected-electron angles 180{degrees} apart; the difference between these spectra then yields the interference spectrum. We will present new high resolution spectra for ejected- electron directions along the momentum-transfer axis; these show the (J = 1) x (J = 2) + (J = 1) x (J = 0) interference effects. We will also present spectra obtained for {open_quotes}magic angle{close_quotes} ejected-electron directions with respect to the momentum transfer axis; these experiments isolate the (J = 1) x (J = 0) interference.
- DOE Contract Number:
- FG05-91ER14214
- OSTI ID:
- 281429
- Report Number(s):
- CONF-9305421--
- Journal Information:
- Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 38; ISSN BAPSA6; ISSN 0003-0503
- Country of Publication:
- United States
- Language:
- English
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