"The short duration afterglow of an r-f discharge in mercury has been examined versus ground state mercury atom density and r-f power. The intensity of the 5771, 5462, 4360, 4079, 4047, 3907, 3651/56, 3342, and 3127/32Å atomic mercury lines were observed to decay as a function of time after the shut off of the active discharge. At temperatures below 333⁰K, all atomic lines decayed exponentially, and no molecular emission was observed. From 333⁰K to 423⁰K, the atomic lines were observed to decay rapidly initially, then exhibit an enhancement effect in intensity which was produced by metastable atom collisions, and finally, the intensity decayed with a small time constant. Above 433⁰K, molecular emission begins to become effective because of the increased ground state atom density, and the overall intensity of the atomic lines is observed to decrease, but the intensity of the lines still exhibited an enhancement effect. Above 473⁰K, molecular emission becomes dominate, and the molecular emission robs the atomic line spectra of energy. From the comparison of theory and result of the experiment, the coefficient of ambipolar diffusion (De) fro the electron can be calculated. The average value calculated is De = 991 cm²/sec. Also, the average value of the lifetime of the metastable 6³P₂ state of mercury can be calculated Tm = 47 microseconds"--Abstract, page [i].
Anderson, Richard A.
Hardtke, Fred C.
Bell, Robert John, 1934-
Rechtien, Richard Douglas
M.S. in Physics
University of Missouri at Rolla
© 1967 James A. Aubrecht, All rights reserved.
Thesis - Open Access
Library of Congress Subject Headings
Mercury -- Spectra
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Electronic OCLC #
Link to Catalog Record
Aubrecht, James A., "A study of the afterglow of an R-F excited mercury discharge" (1967). Masters Theses. 5177.