| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:14 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2001 Meeting
Section: Optics and Spectroscopy
Title:
HOLLOW CATHODE ELECTRIC DISCHARGE AS A SPECTRAL SOURCE. RESULTS AND PERSPECTIVES
Authors:
I.Iova, M.Bazavan and Gh. Ilie
Affiliation:
University of Bucharest, Faculty of Physics 76900 Bucharest-Magurele, P.O. Box MG-11
E-mail
Keywords:
Abstract:
Our interest on the mechanisms of the hollow effect electric discharges producing stems primarily from their use as spectral sources, especially in the emission atomic spectroscopy and gas lasers. This type of electric discharge can contain electrons of 1-2 eV, 20-50 eV or even 50-100 eV energy, results mentioned in several recent papers.
These properties determined us to elaborate a theoretical model for a cylindrical geometry hollow cathode effect used in the excitation and ionization phenomena studies in monoatomic gases, and gas mixtures.
An extension of such studies in a new model concerning the hollow cathode electric discharge in mixed noble gases and metal vapors is also presented.
Some very important evidences concerning the electron energy distributions in the negative glow of a cylindrical hollow cathode electric discharge we obtained by the 2nd positive N2 vibrational band heads relative intensity against the current intensities behaviour. In the experiment set-up we have had a SPM-2 ZEISS 650 tr/mm grating monochromator coupled with a EMI 9558 QB photomultiplier and a SEFRAM GRAPHYSPOT II recorder.
|
|
|
|