Accession Number : ADA115818

Title :   Electron Excitation of O(2) Metastables in O(2)-N(2) Mixtures and of Free-Free Radiation in Argon.

Descriptive Note : Final rept. Oct 80-Sep 81,

Corporate Author : NATIONAL BUREAU OF STANDARDS BOULDER CO QUANTUM PHYSICS DIV

Personal Author(s) : Yamabe,C ; Phelps,A V

PDF Url : ADA115818

Report Date : May 1982

Pagination or Media Count : 40

Abstract : Measurements have been made of electron excitation coefficients for the production of O2(a(1)delta) metastables in mixtures of O2 and N2 for a range of mixture ratios and mean electron energies. The results are in agreement with calculations using the best available electron collision cross sections sets provided proper allowance is made for cascading from high excited states. Measurements have been made of coefficients for the production of free-free photons (Bremsstrahlung) as a result of the collisions of electrons with argon atoms. These measurements were made under the carefully controlled conditions of the electron drift tube. The mean electron energy was varied from 1.4 to 4.2 eV and the wavelength was varied from 500 nm to 1.3 nm. The results are in agreement with theory to within the experimental uncertainty of + or - 20%.

Descriptors :   *Electron beams, *Excitation, *Metastable state, *Collisions, Atoms, Argon, Electrodes, Electron tubes, Electron energy, Mixtures, Ratios, Bremsstrahlung, Coefficients, Mean

Subject Categories : Particle Accelerators
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE