Accession Number:

AD0626978

Title:

THE APPLICATION OF CALCULATION OF ION SOURCE SYSTEMS AND ION ENERGY SPREAD TO SOME OF THE PROBLEMS OF ION-MOLECULE INTERACTIONS,

Descriptive Note:

Corporate Author:

AEROSPACE RESEARCH LABS OFFICE OF AEROSPACE RESEARCH WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

• RYAN,K. R.
• Terry,J. O.

Report Date:

1965-08-01

Pagination or Media Count:

33.0

Abstract:

Calculations are described which were designed to support an experimental attempt to measure the specific reaction rate for typical ion-molecule reactions as a function of reactant ion energy. The time averaged specific reaction rate k is given by k IsIp IsBtau where Ip and Is are the concentrations of the reactant ion and secondary ion respectively, B the concentration of neutral products and tau the total time for reaction. One possible instrument for measuring this energy dependent rate constant is a mass spectrometer. These calculations show that it is possible to obtain a small spread in the kinetic energy of the ions formed and then to measure the energy dependent rate constant. The source residence time for ions in mass spectrometer used is calculated, and the energy spread of the ion beam produced by a 20 nanosecond ionizing pulse was then computed for many conceivable experimental conditions. Author

Descriptors:

• *MASS SPECTROSCOPY
• MOLECULES
• ION SOURCES
• ENERGY
• CONCENTRATION(CHEMISTRY)
• IONS
• KINETIC ENERGY

Subject Categories:

• Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE