Photodissociation Spectroscopy of CO3(-)*

Abstract

The photodissoication cross section of the carbon trioxide negative ion has been measured over the wavelength range from 457.9 nm to 694.0 nm, and reveals detailed structure reflecting the vibrational spacings of the predissociating excited electronic state. From an analysis of the structure, three vibrational modes of the excited state having energies of 900/cm, 1470/cm, and 880/cm were identified. The bond energy of the carbon trioxide negative ion (to separation into a carbon dioxide molecule and an atmoic oxygen negative ion) was determined to be 1.8 + or - 0.1 eV and the electron affinity of carbon trioxide was found to be 2.9 + or - 0.3 eV. By comparison with theoretical calcuations, the lowest predissociating state was identified as the one doublet A one state. Observations regarding other excited states of the carbon trioxide negative ion are made.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1976
Accession Number
ADA032444

Entities

People

  • J. R. Peterson
  • J. T. Moseley
  • P. C. Cosby

Organizations

  • SRI International

Tags

DTIC Thesaurus Topics

  • Carbon Dioxide
  • Electronic States
  • Electrons
  • Molecules
  • Observation
  • Photodissociation
  • Spectroscopy

Readers

  • Molecular Photonics/Laser Physics

Technology Areas

  • Microelectronics
  • Space
  • Space - Hall-Effect Thruster