Basic thermoluminescent and dosimetric properties of Al₂O₃:C irradiated by pulse intensive electron beam

The effect of deep traps filled by a pulse electron beam on the thermoluminescent (TL) properties in Al₂O₃:C dosimetric crystals is studied. When the deep traps are filled, the dosimetric peak at 170 °C acquires a double-peak structure not present in the initial samples. The effect of the population of the deep centers having various nature (electron or hole traps) and energy depth on the shape of the dosimetric TL peak structure is analyzed. An assumption is made that in the temperature ranges of 350–500 °C and 650–750 °C, electron traps are emptied, whereas at T = 500–650 °C hole traps are emptied. The possibility of using the TL associated with deep traps in high-dose dosimetry of pulse electron beams is shown. - Highlights: • The TL of deep traps is found in Al₂O₃:C exposed to high-current electron beam. • Filling of deep traps by pulse electrons affects of the main TL peak at 170 °C. • The assumption on the nature of deep traps with various thermal depths is made. • Applicability of the deep center TL for dosimetry of pulse electrons is shown