Accession Number:

AD0292216

Title:

MEASUREMENT OF THE VAPOR PRESSURE OF ALKALI METALS IN THE RANGE OF 10 TO THE -5TH POWER TO 10 TO THE -2ND POWER MM HG

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1962-10-30

Pagination or Media Count:

1.0

Abstract:

An instrument for measuring the vapor pressures of alkali metals over the range of 10 to the -5th power to 10 to the -2nd power mm Hg is described. The operation of the instrument is based on the surface ionization of the alkali metal atoms on tungsten. The time constant of the instrument is approximately 10 to the -6th power sec. At the present time, the well-known dependence of the vapor tension of a metal upon thermostat temperature is used to determine the vapor pressures of the alkali metals. This method is applicable only in cases of complete equilibrium in the investigated system. In addition, the method has considerable inertia and cannot be used for continuous measurements. In a number of actual systems, continuous and low-inertia control of the vapor pressures of alkali metals is necessary. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE