Accession Number : ADA290872

Title :   Theoretical Absorption Spectroscopy of High-Temperature Metal Vapors: Model and Experiment Compared.

Descriptive Note : Final rept.

Corporate Author : PHILLIPS LAB EDWARDS AFB CA

Personal Author(s) : Mills, Jeffrey D.

PDF Url : ADA290872

Report Date : DEC 1994

Pagination or Media Count : 36

Abstract : Theoretical calculations in support of absorption spectroscopy of buffered metallic vapors in the Plasma Spectroscopy Cell are described. After a brief exposition of the theoretical principles and ingredients of the quantum-mechanical, state-to-state treatment of transition processes in atoms and diatoms at thermodynamic equilibrium, various aspects of the model and experimental absorption spectra for the lithium system are compared and discussed. Special emphasis is given to outlining those spectral characteristics which are most relevant to the energy transfer properties of the sample but are as yet incompletely understood and to determining the minimal computational algorithm sufficient to rapidly and accurately calculate absorption by these materials. An account of the modelling of the aluminum/lithium system preparative to a search for a heretofore unobserved molecule, aluminum lithium, is also included. High temperature, (jg)

Descriptors :   *HIGH TEMPERATURE, *ABSORPTION SPECTRA, *METAL VAPORS, ALGORITHMS, BUFFERS, COMPUTATIONS, SPECTROSCOPY, THERMODYNAMICS, CELLS, COMPOSITE MATERIALS, PLASMAS(PHYSICS), QUANTUM THEORY, ENERGY TRANSFER, EQUILIBRIUM(GENERAL), ATOMS, LITHIUM, ELECTRONIC STATES, ALUMINUM, TRANSITIONS.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE