Beta Dosimetry Research Articles

Thermally Stimulated Exoelectron Emission from Lithium Fluoride for Beta and Gamma Dosimetry

Thermally Stimulated Exoelectron Emission from Lithium Fluoride for Beta and Gamma Dosimetry

A new approach to the beta dosimetry of ceramics for thermoluminescence dating

A new approach to determining the internal beta dose-rate in ceramics for thermoluminescence dating was investigated. It consisted of using grains of quartz as thermoluminescence beta dosimeter employing the 110°C peak with the grains maintained at liquid nitrogen temperature to avoid fading. Beta dose-rates were also measured by CaSO 4: Mn dosimeters for comparison. The tests were carried out on clay powders and on simulated postherds which had been fired at different temperatures. The dose-rates found for the powdered clays and the different ceramics, both dry and wet, are compared and discussed.

The development of thin CaSO 4:Dy Teflon TL dosimeters for beta dosimetry in personnel monitoring

This paper describes the development of thin (0.1 and 0.2 mm) CaSO 4:Dy Teflon dosimeters thermally bonded to thick (0.7 and 0.6 mm respectively) Teflon bases for application to β-dosimetry in personnel monitoring. The composite dosimeters (13 mm dia. and 0.8 mm thick) were found quite rigid and they do not deform during their readout. The TL response of the 0.1 mm TL dosimeter was found to be β-energy independent in the energy range 0.76–2.25 MeV. The TL response of the 0.2 mm dosimeter, however, decreased with decreasing β-energy in this range. The minimum detectable γ-dose with 0.1 mm TL dosimeters was found to be 0.13 mGy. Hence, due to their energy independence, mechanical strength, TL efficiency, and capability in low dose measurements, the 0.1 mm CaSO 4:Dy Teflon dosimeters thermally bonded to 0.7 mm Teflon base were found suitable for β-dosimetry in personnel monitoring.