Accession Number:

AD0655292

Title:

MASS SPECTROMETRIC STUDY OF HOMOGENEOUS NUCLEATION IN FREE JETS.

Descriptive Note:

Summary technical rept.,

Corporate Author:

MIDWEST RESEARCH INST KANSAS CITY MO

Personal Author(s):

Report Date:

1967-07-27

Pagination or Media Count:

12.0

Abstract:

Free-jet expansions are being used to study the kinetics of the growth of clusters in highly supersaturated systems. A gas or gas mixture is expanded from high pressures into a vacuum to form a free jet, which is then collimated into a molecular beam and introduced into the ion source of a mass spectrometer. The gases Ar, NO, N2, O2, CO2 and H2O, as well as the higher temperature species Hg, CsCl and Li, were examined. Some of the observed phenomena may be explained by the postulation of metastable dimers. Generalizations were attempted about the kinetics of cluster growth and about the conditions under which nucleation is apt to be important in beam formation and molecular beam sampling. Author

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE