The production and destruction of negative ions. Progress report, September 1, 1992--August 31, 1993
Single photon absorption-single electron detachment from few-electron atomic negative ions was studied. A crossed beam apparatus is being used to perform energy- and angle-resolved photoelectron spectroscopic measurements following photodetachment. Forward-directed electrons were collected and energy analyzed. The kinetic energies and yields of the photoelectrons were obtained by fitting the spectral peaks to Gaussian functions. Electron affinities, asymmetry parameters and cross sections are determined from these measurements. A ratio method in which the cross section for the ion of interest is measured relative to that of a reference ion was used. The study of the photodetachment of Li{sup {minus}} was completed, and attention has turned to the photodetachment of the stable ion B{sup {minus}} and the metastable ion Be{sup {minus}}.
- Research Organization:
- Tennessee Univ., Knoxville, TN (United States). Dept. of Physics
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG05-85ER13456
- OSTI ID:
- 10135170
- Report Number(s):
- DOE/ER/13456--47; ON: DE93010527
- Country of Publication:
- United States
- Language:
- English
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