Zeeman Effect of the Forbidden Lines of Potassium

Abstract

The Zeeman effect of the lines $S-S$ and $S-D$, absorbed by potassium vapor in an electric field of about 2000 volts/cm, is studied. A magnetic field of 27,000 gauss was obtained by using the magnet of the new Berkeley cyclotron. The lines $4S-14S$ to $4S-19S$ show no effect, except for a slight broadening of the last one or two lines. The Zeeman patterns for $4S-12D$ to $4S-15D$, with the magnetic field perpendicular to the electric field and to the direction of observation, are resolved. They agree with the predicted pattern $\frac{0\left(1\right)2}{1}$, and show qualitatively the expected intensities.