K-Emission Spectrum of Metallic Lithium

The emission spectrum of an evaporated lithium target has been investigated in the spectral region extending from 60 to 600 A. The intensity distribution of the characteristic $K$ emission band has been determined photometrically. Some features of the distribution $\frac{I\left(E\right)\mathrm{}}{{\nu }^2}$ are as follows: the band has a maximum at 54.02 ev (229.50 A); the distribution drops to one-half of its maximum value on the high-energy side at 54.58 ev; and the decay in intensity from the peak to the high-energy limit of the band occurs in an energy interval of 1.18 ev. In agreement with the results of earlier investigators, the band does not show a sharp high-energy cutoff. A second band, similar in shape and having a maximum at 82.83 ev, has been observed and is presently identified as a $K$ satellite.