Beta and X-ray spectrometer for monitoring of beta-radiating nuclides

The design and characteristics of the spectrometer for beta-particles and conversion electrons in the energy range from 15 to 3000 keV and X-ray radiation from 2 to 60 keV are presented. Radiation is detected by a 4.5-mm-thick SiLi detector with a sensitive area of 500 mm/sup 2/. The energy resolution for conversion electrons with the energy of 624 keV is 2.0 keV and, for X-rays with the energy of 5.9 keV, is 280 eV.