ANALYTIC CROSS SECTIONS FOR INELASTIC COLLISIONS OF PROTONS AND HYDROGEN ATOMS WITH ATOMIC AND MOLECULAR GASES.
Research rept. Jul 69-May 70,
AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS
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Convenient analytic formulas are given for inelastic cross sections for collisions of protons and hydrogen atoms with atomic and molecular gases in the 0.5 keV - 5 MeV energy range. Essentially, they are convenient interpolation formulas that span the broad energy region important in atmospheric physics, astrophysics, radiation physics, and plasma physics. The asymptotic form of the analytic expressions is shown to be equivalent in appropriate cases to theoretical results obtained with the well-known Born approximation. The parameters of the formulas are evaluated for noble gases and for diatomic atmospheric gases with the aid of electron impact data and recent experimental results of proton and hydrogen atom impact experiments. The systematics of the parameters are discussed. Author
- Physical Chemistry