  The relative intensities of the thick-target bremsstrahlung produced by
10-keV and 20-keV electrons incident on Au at forward angles ranging from 0
degrees to 25 degrees are compared. Following corrections for photon absorption
within the target, the detected radiation appears to be distributed
anisotropically only for photon energies, k, that are approximately equal to
the initial energy of the incident electrons, E. The results are compared to
the theoretical angular distributions of Kissel et al. [At. Data Nucl. Data
Tables 28, 381 (1983)]. The comparison suggests that when k/E is approximately
equal to 1, the angular distribution of bremsstrahlung emitted by electrons
incident on thick targets is similar to the theoretical angular distribution of
bremsstrahlung emitted by electrons incident on free-atom targets.
