Doctoral Dissertations

Abstract

"The nucleation of water vapor on ions in atmospheres of helium and argon was studied using an expansion type cloud chamber. Separation of the positive and negative ions was achieved so that the nucleation could be studied as a function of both the sign of the ionic charge and the supersaturation. A semiphenominological theory was developed as an extension of the classical theory to include the effects of the ionic charge on the nucleation process. The theoretical model of the prenucleation embryo was assumed to possess an oriented dipole surface layer with the direction of orientation dependent on the sign of the ionic charge. The theory predicts not only the increase in the nucleation rate compared to that for homogeneous nucleation and a difference in rate between positive and negative ions, the negative ions having the higher nucleation rate, but also predicts a correction term to the classical theory of homogeneous nucleation for polar molecules which exhibit an electrical double layer at the liquid surface. Comparisons between the experimental and theoretical results for homogeneous nucleation, and nucleation on both positive and negative ions were made and the results used to draw some conclusions as to the possible structure of the prenucleation embryo"--Abstract, page iii.

Advisor(s)

Kassner, James L.

Committee Member(s)

Montgomery, David N.
Rivers, Jack L.
Penico, Anthony Joseph
Lund, Louis H.

Department(s)

Physics

Degree Name

Ph. D. in Engineering Physics

Sponsor(s)

National Science Foundation (U.S.)

Publisher

University of Missouri--Rolla

Publication Date

1970

Pagination

viii, 40 pages

Note about bibliography

Includes bibliographical references (pages 38-39).

Rights

© 1970 Daniel Ralph White, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Library of Congress Subject Headings

Water vapor, Atmospheric
Atmospheric nucleation
Ionization of gases

Thesis Number

T 2409

Print OCLC #

6023525

Electronic OCLC #

854576594

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