The production and destruction of negative ions

Technical Report · Fri Jan 01 04:00:00 EST 1993

DOI:https://doi.org/10.2172/6610004· OSTI ID:6610004

Pegg, D J

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: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG05-85ER13456
• OSTI ID: 6610004
• Report Number(s): DOE/ER/13456-47; ON: DE93010527
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
AFFINITY
ALKALINE EARTH METALS
BERYLLIUM
BERYLLIUM IONS
BORON IONS
CHARGED PARTICLES
COLLISIONS
DATA
DOCUMENT TYPES
ELECTRON DETACHMENT
ELEMENTS
ENERGY DEPENDENCE
EXPERIMENTAL DATA
INFORMATION
ION COLLISIONS
IONS
METALS
NUMERICAL DATA
PHOTON COLLISIONS
PHOTON-ION COLLISIONS
PROGRESS REPORT