Doctoral Dissertations


"The behavior of the sticking coefficient of CO₂ on an H₂O substrate as a function of time is interpreted in terms of a microscopic nucleation theory. For a substrate temperature near 75 K and an incident flux near 1013 molecule cm⁻² sec⁻¹, a critical cluster size of four molecules and and activation energy of nucleation of 22 ± 2.4 Kcal mole⁻¹ is obtained. The analysis treats the nucleation processes as continuous rather than as a discontinuous process at some critical temperature.

In addition the same molecular beam apparatus used for the above experiment was used to measure the condensation coefficient, γ, of H₂O, N₂O, and CO₂, each on a surface of the condensed phase of the same molecule, i.e., H₂O on H₂O, N₂O on N₂O and CO₂ on CO₂. This ratio, γ, was observed to be a function of the beam temperature, incident flux, and the time that the surface was exposed to the beam as well as the surface temperature. Problems associated with the definition of γ are discussed in attempts to explain the data. The range of γ observed was 0.5 to 0.995.

As part of these experiments the sublimation rate of H₂O, CO₂, N₂O, and to have been measured in the temperature range that correspond to vapor pressure between 10-4 and 10-9 Torr"--Abstract, page iii.


Levenson, L. L., 1928-1998

Committee Member(s)

Adawi, I., 1930-
Snow, William R.
Goben, C. A.
Bell, Robert John, 1934-



Degree Name

Ph. D. in Physics


National Science Foundation (U.S.)
University of Missouri--Rolla. Graduate Center for Materials Research
University of Missouri--Rolla. Graduate Center for Cloud Physics Research
United States. Air Force


Supported by the Atmospheric Science Section of the National Science Foundation under Grant GA 13948.


University of Missouri--Rolla

Publication Date


Journal article titles appearing in thesis/dissertation

  • Critical Sticking Cluster Size Determination from Coefficient and Flash Desorption Measurements
  • Condensation Coefficient Measurements of H₂O, N₂O, and CO₂
  • Sublimation Rates and Vapor Pressures of H₂O, CO₂, N₂O, and Xe


ix, 88 pages

Note about bibliography

Includes bibliographical references.


© 1973 Charles E. Bryson, III, All rights reserved.

Document Type

Dissertation - Restricted Access

File Type




Library of Congress Subject Headings

Atmospheric physics -- Mathematical models
Gases -- Absorption and adsorption
Vapor pressure -- Measurement
Surface chemistry

Thesis Number

T 2798

Print OCLC #


Electronic OCLC #


Link to Catalog Record

Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.

Share My Dissertation If you are the author of this work and would like to grant permission to make it openly accessible to all, please click the button above.