Electron impact excitation of the G /sup 1/. sigma. /sup +//sub g/ state of H/sub 2/

Journal Article · Wed Nov 30 23:00:00 EST 1977 · J. Opt. Soc. Am.; (United States)

DOI:https://doi.org/10.1364/JOSA.67.001641· OSTI ID:5162763

Anderson, R J; Watson, J; Sharpton, F A

The optical excitation function for the G /sup 1/..sigma../sup +//sub g/ ..-->.. B /sup 1/..sigma../sup +//sub u/ transition of the H/sub 2/ spectrum has been determined for the electron impact energies in the range 0-500 eV and at H/sub 2/ gas pressures < or = 30 mtorr. Measurements of the absolute emission cross section for the lambda = 4634 A (G ..-->.. B(0, 0)P1,R2,R3) vibration-rotational line blend have been carried out at 200 eV incident electron energy. Measurements of the G /sup 1/..sigma../sup +//sub g/(v' = 0) state radiative lifetime have also been carried out and yield a single-mode decay, with a lifetime of approx. 30 ns. Both dc intensity and time-solved lifetime measurements are observed to be independent of H/sub 2/ gas pressure and electron beam current over the regions approx. 2 to 50 mtorr and 5 ..mu..A to 1 mA, respectively.

• Research Organization: Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701
• OSTI ID: 5162763
• Journal Information: J. Opt. Soc. Am.; (United States), Journal Name: J. Opt. Soc. Am.; (United States) Vol. 67:12; ISSN JOSAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular &amp; Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
EMISSION SPECTRA
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 01-10
EV RANGE 10-100
EV RANGE 100-1000
EXCITATION FUNCTIONS
FLUIDS
HYDROGEN
MOLECULE COLLISIONS
NONMETALS
SPECTRA