Accession Number : ADA137153

Title :   Fluorescence and Electron Energy Loss Cross Sections in Mercuric Bromide.

Descriptive Note : Final rept. 17 Mar-31 Oct 83,


Personal Author(s) : Chantry,P J ; Chen,C L

PDF Url : ADA137153

Report Date : 22 Dec 1983

Pagination or Media Count : 59

Abstract : Computer modelling of HgBr discharge lasers requires as input the various cross sections for electron impact on HgBr2. This report describes measurements of the wavelength resolved emission cross section measured between 240 and 530 nm. This range encompasses three bands: The (D-X), (C-X) and B-X which have been documented and discussed previous. In addition we find a fourth band which appears on the long wavelength side of the (C-X) band, and overlaps the short wavelength tail of the (B-X) band. Measurements of the wavelengths at which local maxima appear in the fluorescence agree acceptably with Wielands' data on this band, which we designate as the (B'-X) band. A systematic approach to partitioning the spectrum between the various bands has been adopted in order to derive total band emission cross sections for all four bands. A more extensive series of measurements on the benchmark He line emission cross sections has led to a revised method of calibration the HgBr data.

Descriptors :   *Mercury compounds, *Bromides, *Fluorescence, *Cross sections, Electron energy, Losses, Impact, Frequency, Emission spectra, Band spectra, Measurement, Dissociation, Electron beams, Lasers, Excitation, Threshold effects, Collisions, Calibration, Photons, Counting methods, Line spectra, Trapping(Charged particles), Quantum theory

Subject Categories : Lasers and Masers
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE