By Institute of Physical Chemistry, Bulgarian Academy of Sciences
Multyfrequency EPR spectrometer operating at two radiofrequencies: fixed 9 GHz (X-band) and 35 GHz (Q-band). UV-system for measurement of photoactive substances. Variable temperature unit for low and high temperature experiments: from 70 to 500 K. Flat cell cuvette for analysis of liquids. Quartz tubes for measurement of powdered samples;