Production and Properties of Metastable Autodetaching Negative Ions.

Abstract

Experimental work has been directed primarily determining properties of metastable autodetaching negative ions, with a smaller effort directed to their production in beams, as well as the production and photodetachment of Li(-) beams. Properties of particular concern were the photodetachment cross sections, energy levels, and autodetachment lifetimes. Detailed studies have been made of resonant structures in the photodetachment of He(-) and Li(-) negative ions. Some previously reported metastable ions were found to be probably nonexistent, while others were given the first experimental proof, and one unpredicted species (He2(-)) was discovered. A long-lived auto-detaching form of OH(-) was also observed. Total neutralization cross sections were measured as functions of beam energy for Li(+) in Mg, Ca, Sr, and Ba, and cross sections were calculated for Li(+) + Ca. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 20, 1985
Accession Number
ADA161256

Entities

People

  • James R. Peterson
  • Michael J. Coggiola

Organizations

  • SRI International

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Abstracts
  • Air Force
  • Charge Transfer
  • Classification
  • Electron Capture
  • Electrons
  • Energy
  • Ground State
  • High Resolution
  • Ion Beams
  • Ion Sources
  • Jet Propulsion
  • Measurement
  • Metastable State
  • Neutral
  • Production
  • Resonance

Readers

  • Molecular Photonics/Laser Physics