Intensitätsmessungen an Röntgen-Bremsstrahlung im Energiebereich von 200 bis 10 eV / Intensity measurements of bremsstrahlung in the 200 to 10 eV region

Thermoluminescence in LiF single crystals offers the possibility of measuring the intensity of bremsstrahlung with energies down to about 13.5 eV. An apparatus was developed which permits the production of sufficiently intense X-ray continua with voltages of 600 to 10 V. The high sensibility of LiF also for low-energy radiation made it possible to study the relation between the intensity of the ultrasoft X-ray continuum and the tube voltage. The past experimental and theoretical studies showed varying results in this respect. The results of the present experiments allow the conclusion that the integral intensity of extremely low-energetic bremsstrahlung produced in solid-state anodes is proportional to the square of effective tube voltage, i.e. the kinetic energy of the electrons striking the anode