Accession Number : AD0711661

Title :   ANALYTIC CROSS SECTIONS FOR INELASTIC COLLISIONS OF PROTONS AND HYDROGEN ATOMS WITH ATOMIC AND MOLECULAR GASES.

Descriptive Note : Research rept. Jul 69-May 70,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Green,A. E. S. ; McNeal,R. J.

Report Date : 15 JUL 1970

Pagination or Media Count : 42

Abstract : 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)

Descriptors :   (*HYDROGEN, *ION BOMBARDMENT), (*ATOMS, ION BOMBARDMENT), (*IONIZATION, ELECTRON CAPTURE), ELASTIC SCATTERING, IONIZATION, PROTONS, HYDROGEN, DIFFERENTIAL CROSS SECTIONS

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE