Studies on some materials suitable for use as internal standards in high energy EPR dosimetry

EPR-spectroscopic properties (line-intensity, -width, and g-factors) of pyr olized at 550 degrees C sucrose, MgO and MgO doped with Mn2+ ions (500:1) r emain unchanged after high-dose (1-100 kGy) irradiation, whereas CaO gives an EPR signal. These properties of these materials make it possible to use them as internal reference EPR standards in the work under conditions of st rong ionisation environment, for precise determination of the G-values of o ther materials, for obtaining exact magnitudes of increase of the EPR respo nse when the method of additional dose is applied, to follow the kinetics o f decay of some radiation induced defects.