Abstract
Two techniques are described for the measurement of atomic-state densities by self-absorption within a discharge. One is a variation of a previous method in which a mirror is used to reflect light back through the discharge to the detecting monochromator. This is mainly suitable for use in the visible spectral region. The other technique depends on a comparison of the signals obtained when different lengths of the discharge are excited. It is especially useful in the vacuum. Results are presented to illustrate the two methods.
© 1969 Optical Society of America
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