On the generation of intense Cs K X-rays upon electron excitation of a mo target heat treated in Cs and O$_2$ vapors

The possibility of stable generation of intense characteristic Cs radiation upon electronic excitation of a Mo anode target heat treated in Cs and O$_2$ vapors is demonstrated. The radiation source is a microfocus transmission type X-ray tube with a beryllium window and an S20 photocathode. A Cs-Mo-O layer is formed on the initial target in the form of a 1-$\mu$m-thick Mo film during heat treatment. The L and K spectral series are measured in an anode–cathode voltage range of 10–47 kV. A stable generation mode is observed at an electron flux power density up to 600 W/cm$^2$. The energy of the Cs K$_\beta$ spectral line is in the region of photoabsorption peaks of the I and Xe atoms, which are widely used in the composition of contrast agents for medical diagnostics. This allows obtaining two- and three-dimensional images with the maximum contrast.