Kinetic, Thermochemical, and Photodissociation Studies of Sulfur- Containing Atmospheric Ions

Abstract

The rate constants of 25 reactions involving sulfur-containing ions or molecules at 298 K have been measured. Based on the results obtained a new condition for efficient charge transfer is proposed and reactions leading to formation of stratospheric ions with m/z=60, 78, and 98 are identified. The first complete mass spectra of sulfuric acid vapor have been obtained, its ionization potential has been found to be 12.40 + or - .5 ev, and the appearance potentials for four of its fragment ions have been measured. From these data the HO3S+-OH bond dissociation energy has been calculated to be 1. 50 + or - 0.15 ev. A ion photofragment momentum spectrometer has been constructed and preliminary tests of its performance have been made. Keywords: Kinetics of ion- molecule reactions, Thermochemistry of ions, Sulfuric acid, Sulfur compounds, Atmospheric chemistry.

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Document Details

Document Type
Technical Report
Publication Date
Aug 29, 1987
Accession Number
ADA200740

Entities

People

  • Timothy F. Thomas

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Air Force
  • Chemical Reactions
  • Chemistry
  • Data Analysis
  • Dissociation
  • Electron Energy
  • Electrons
  • Energy
  • Energy Transfer
  • Ionization
  • Ionization Chambers
  • Laser Beams
  • Laser Dyes
  • Mass Spectra
  • Measurement
  • Spectra
  • Spectroscopy

Fields of Study

  • Chemistry

Readers

  • Molecular Photonics/Laser Physics
  • Organic Chemistry

Technology Areas

  • Space
  • Space - Hall-Effect Thruster