Thermalization of suprathermal N(4 S) atoms in He and Ar gases

Journal Article

The potential energies of nitrogen atoms interacting with helium and argon atoms are determined and the rates of thermalization of initially energetic nitrogen atoms traversing bath gases of helium and argon atoms are obtained. The C6 dispersion coefficients are determined to be 5.79 a.u. for N-He and 39.42 a.u. for N-Ar. Quantum mechanical calculations of the differential scattering cross-sections are carried out and used to find solutions to the kinetic Boltzmann equations. The rates of thermalization are compared with experiments on the translational energy relaxation of nitrogen atoms produced by the photolysis of NO2. The accuracy of the hard sphere approximation in interpreting the data is explored, and found to be satisfactory with hard sphere cross-sections of 1.50 10-15 cm2 for helium and 1.98 10-15 cm2 for argon.

Full Text

Duke Authors

Cited Authors

  • Zhang, P; Kharchenko, V; Dalgarno, A

Published Date

  • June 1, 2007

Published In

Volume / Issue

  • 105 / 11-12

Start / End Page

  • 1487 - 1496

Electronic International Standard Serial Number (EISSN)

  • 1362-3028

International Standard Serial Number (ISSN)

  • 0026-8976

Digital Object Identifier (DOI)

  • 10.1080/00268970701210008

Citation Source

  • Scopus