Effective Depth of Formation of X‐Ray Line Radiation

The mechanism of production of line radiation in a thick target differs from that of bremsstrahlung radiation. As a result the effective depths of formation of the two types of radiation, under identical conditions, are not the same. With relatively low voltage across the x‐ray tube, the average change in the depth of production with voltage was found to be 300 A/kV for the continuum while the line data gave a value of 440 A/kV, in anode material having an atomic number of about 30. The dependence of the two quantities on the takeoff angle has also been investigated.