Accession Number : AD0636034

Title :   NEUTRAL ATOM BREMSSTRAHLUNG.

Descriptive Note : Research rept.

Corporate Author : AVCO EVERETT RESEARCH LAB EVERETT MASS

Personal Author(s) : Kivel, B.

Report Date : JUN 1966

Pagination or Media Count : 46

Abstract : Predictions are given for the Bremsstrahlung absorption cross section of atomic oxygen and atomic nitrogen. The electron-atom interaction potential energy is adjusted to give agreement with the photo-absorption measurements of the negative oxygen ion. The exchange force is treated in an approximate manner following a suggestion by Slater but adjusted to take account of the dependence on the configuration of the electron wave. The difference in the exchange force for s and p-waves as well as the difference between the triplet and quintet configurations in atomic nitrogen must be preserved to obtain predictions for the Bremsstrahlung which are in agreement with experiments. The atomic oxygen absorption cross section is about a factor 5 less than that of atomic nitrogen in agreement with the measurements of Taylor. The Maxwell average atomic nitrogen Bremsstrahlung absorption cross section is insensitive to temperature. The atomic nitrogen cross section deviates somewhat from the Kramers wavelength dependence becoming relatively larger in the blue. (Author)

Descriptors :   (*BREMSSTRAHLUNG, *NUCLEAR CROSS SECTIONS), (*OXYGEN, BREMSSTRAHLUNG), (*NITROGEN, BREMSSTRAHLUNG), ELECTRONS, ELASTIC SCATTERING, POLARIZATION, ATOMIC ENERGY LEVELS, INFRARED RADIATION, AIR

Subject Categories : Atmospheric Physics
      Radiation and Nuclear Chemistry
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE