MASS SPECTROMETRIC STUDY OF HOMOGENEOUS NUCLEATION IN FREE JETS.

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)

Document Details

Document Type
Technical Report
Publication Date
Jul 27, 1967
Accession Number
AD0655292

Entities

People

  • Frank T. Greene
  • Thomas A. Milne

Organizations

  • MRIGlobal

Tags

DTIC Thesaurus Topics

  • High Pressure
  • Ion Sources
  • Ions
  • Kinetics
  • Mass Spectrometers
  • Molecular Beams
  • Nucleation
  • Sampling
  • Spectrometers

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Materials Science and Engineering.
  • Plasma Physics.