Angular Distribution of Bremsstrahlung Produced by 10-keV and 20-keV Electrons Incident on a Thick Au Target

TL;DR

This study measures the angular distribution of bremsstrahlung produced by 10-keV and 20-keV electrons on gold, finding anisotropic emission near the initial electron energy and comparing results to theoretical models.

Contribution

It provides experimental data on bremsstrahlung angular distribution for thick gold targets at low electron energies, validating theoretical predictions.

Findings

Anisotropic bremsstrahlung distribution observed near initial electron energy.

Results agree with theoretical angular distributions for free-atom targets when k/E ≈ 1.

Data enhances understanding of bremsstrahlung emission in thick targets.

Abstract

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.