Accession Number : AD0776002

Title :   Plasma Spectroscopy of Negative Ions for Applications to Ionospheric Research.

Descriptive Note : Final rept. 1 Feb 69-31 Aug 73,

Corporate Author : JOINT INST FOR LAB ASTROPHYSICS BOULDER COLO

Personal Author(s) : Cooper,J. ; Slater,J.

Report Date : DEC 1973

Pagination or Media Count : 30

Abstract : An experimental investigation is made of a singlet P resonance in H(-) by means of photoabsorption spectra. The predicted resonance wavelength is 1129.5 A and a windowless vacuum uv apparatus which allows absorption studies on ionized species has been developed. Basic equipment is described. H(-) densities are generated in the afterglow of the Z-discharge through a mixture of hydrogen and cesium. The resonance was not observed, probably because of overlying 2-1 band lines of the H2 Lyman system which were more intense than originally predicted. However, the techniques developed in this work represent a significant contribution in that they for the first time allow time resolved absorption spectra on ionized species. (Modified author abstract)

Descriptors :   *Ultraviolet spectroscopy, *Hydrogen, Ions, Atomic energy levels, Ultraviolet spectra, Absorption spectra, Anions, Plasmas(Physics), Resonance absorption, Experimental design

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE