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Kinetic Reaction Coefficients in Rocket Exhaust Plumes.
Interim rept. 1 Mar 74-31 Jun 75,
MISSOURI UNIV ROLLA DEPT OF PHYSICS
Pagination or Media Count:
During the first year of the program, the cross section photoionization of excited potassium atoms has been measured from threshold to 2500A. A drift tube apparatus with a quadrupole mass spectrometer for ion identification has been constructed to study dissociative attachment of HCl. The primary ion, C1-, has been found to form molecular negative ions identified as HClCl-,HCl2Cl-, and the impurity ion H2O,Cl-. For drift tube conditions near the threshold for dissociative attachment for HCl, the molecular negative ions are most abundant at higher drift tube energies, the atomic negative ion dominates. A xenon-ion laser has been constructed and its power level optimized so that a frequency doubling crystal can be used to make a useful source of ionization for future recombination measurements. Cross sections for the formation of Cl from Cl2 and HCl by electron impact have been measured from threshold to 100eV.
APPROVED FOR PUBLIC RELEASE