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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 67, Iss. 12 — Dec. 1, 1977
  • pp: 1641–1643

Electron impact excitation of the G 1Σ+g state of H2

Richard J. Anderson, J. Watson, Jr., and Francis A. Sharpton  »View Author Affiliations

JOSA, Vol. 67, Issue 12, pp. 1641-1643 (1977)

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The optical excitation function for the G1Σ+gB1Σ+u transition of the H2 spectrum has been determined for the electron impact energies in the range 0-500 eV and at H2 gas pressures ≤ 30 mtorr. Measurements of the absolute emission cross section for the λ = 4634 Å [GB(0,0)P1,R2,R3] vibration-rotational line blend have been carried out at 200 eV incident electron energy. Measurements of the G1Σ+g(ν′ = 0) state radiative lifetime have also been carried out and yield a single-mode decay, with a lifetime of ∼30 ns. Both dc intensity and time-solved lifetime measurements are observed to be independent of H2 gas pressure and electron beam current over the regions ∼ 2 to 50 mtorr and 5 µA to 1 mA, respectively.

© 1978 Optical Society of America

Richard J. Anderson, J. Watson, Jr., and Francis A. Sharpton, "Electron impact excitation of the G 1Σ+g state of H2," J. Opt. Soc. Am. 67, 1641-1643 (1977)

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