KINETICS OF ION FORMATION DURING CHEMICAL REACTION IN SHOCK WAVES.
Final scientific rept.,
TORONTO UNIV (ONTARIO) DEPT OF CHEMISTRY
Pagination or Media Count:
The objective of this research was to study the mechanisms and rates of processes which form ions at high temperatures in gases. The processes studied include direct formation of ions by chemical reaction, and ion formation by energy transfer mechanisms. Apparatus which was built for this work includes a shock tube and quadrupole mass spectrometer. By use of this equipment, gas could be heated to any chosen temperature in the temperature range 1500 to 8000K. The formation of ions was followed by sampling the heated gas directly from the reflected shock region into the mass spectrometer. Use of a fast response detector ensured that the time dependence of the concentration of any chosen type of ion could be followed. Using this experimental method, the following have been studied chemi-ionization in C2H2-O2-Ar and H2-O2-C2H2-Ar mixtures, thermal ionization of gaseous NO highly dilute in krypton and the initial ionization process in gaseous krypton and xenon. Quantitative data have been obtained about the rates of the ionization processes. The mechanism of ionization is discussed. Author
- Atomic and Molecular Physics and Spectroscopy