Infrared photodetachment of Ce{sup -}: Threshold spectroscopy and resonance structure
Journal Article
·
· Physical Review. A
- Department of Physics and Astronomy, Denison University, Granville, Ohio 43023 (United States)
The negative ion of cerium is investigated using tunable laser photodetachment threshold spectroscopy. The relative cross section for photodetachment from Ce{sup -} is measured over the photon energy range 0.61-0.75 eV using a crossed laser-beam-ion-beam technique. The spectrum of neutral atom production reveals a photodetachment threshold at 0.65 eV, which is interpreted as the threshold for the Ce{sup -} (4f5d{sup 2}6s{sup 2} {sup 4}H{sub 7/2}) to Ce (4f5d6s{sup 2} {sup 1}G{sub 4}) ground-state to ground-state transition yielding the electron affinity of Ce to be 0.65(3) eV. At least five narrow peaks are observed in the cross section over the range 0.62-0.70 eV due to negative ion resonances, and their energies and widths are measured. The results are compared to other recent experimental and theoretical studies of Ce{sup -}.
- OSTI ID:
- 21028009
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 76; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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