Effective Cross Sections for Excitation of Atomic Oxygen by Electron Impact.

摘要

Effective cross sections for excitation of atomic oxygen by 600-3000 eV electrons were obtained for the O(II)4351.3 A spectral line corresponding to the 3p'(2)D(o)5/2 yields 3s'(2)D5/2 transition and the O(II)4414.9 A and O(II)4417.0 A lines of the 3p'(2)D(o) yields 3s(2)p multiplet. Oxygen atoms were produced in the absence of O2 molecules by the N+NO yields N2+O titration reaction. To minimize 0 atom recombination and elastic scattering of the electron beam, the N2-O gas mixture was expanded into a vacuum chamber resulting in a free jet flow. This provides a unique technique for excitation cross section measurements of free radicals and reactive gases. (Author)