Doctoral Dissertations

Abstract

"A comprehensive set of measurements of the electron drift velocities and apparent ion formation cross sections has been completed for gaseous mixtures containing mercuric bromide using electron swarm techniques. Results are presented for binary mixtures of HgBr2 and the rare gases neon, argon and xenon, with the concentration of HgBr2 varied from 0.01% to 0.2% of the total. None of the measured quantities show a temperature dependence from 100 ° C to 150 ° Cover the range studied from 1 to 100 Townsend (1 Townsend = 1 Td = 10-17 volt•cm2) in all of the gas mixtures. The measured electron drift velocities increase with increased concentration of HgBr2 in each gas for E/N ratios (electric field/gas number density) less than 25 Td. The electron attachment and ionization rates are smaller in xenon than in argon, while these rates are largest for the neon gas mixtures.

Use of a photomultiplier tube, narrow band filter centered on 500 nanometers and a photon countin g system confirms that HgBr is excited to the B-state. The light data show that both dissociative attachment and electron impact excitation occur. At low E/N dissociative attachment leads to HgBr in the X-state in all gas mixtures"-- Abstract, p. ii

Advisor(s)

Nygaard, Kaare J.

Committee Member(s)

Plummer, O. R.
Clark, John T.
Peacher, Jerry
Illegible Signature

Department(s)

Physics

Degree Name

Ph. D. in Physics

Publisher

University of Missouri--Rolla

Publication Date

Fall 1981

Pagination

x, 68 pages

Note about bibliography

Includes bibliographical references (pages 37-38)

Rights

© 1981 Howard Lundgren Brooks, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Thesis Number

T 4657

Print OCLC #

8663976

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