A Personnel Dosimeter TLD Badge Based on CaSO4

Abstract

A thermoluminescent dosimeter badge has been designed for use in a countrywide personnel monitoring program. The badge is based on CaS0,:Dy phosphorembedded Teflon TLD discs. A set of metal filters has been incorporated in the badge to compensate for the energy-dependent response of the CaSOs:Dy phosphor at low photon energies. An open-window region has been provided for estimating beta dose. The response of the badge to beta and gamma radiation, its energy and angular dependence, and its reusability in a number of repeated cycles of measurements are discussed.

Compliance of Bhabhatron‐II telecobalt unit with IEC standard ‐ radiation safety

“…The exposed radiographic films were evaluated to locate the point of maximum leakage radiation through the X and Y collimators in source ON condition. For the measurement of absorbed dose due to collimator transmission (radiation leakage), : Dy (0.05 mole %) teflon embedded thermoluminescent (TL) discs (7) (having a thickness of 0.8 mm and a diameter of 13.3 mm) with 5 mm buildup of virtual water were used at the point of maximum – as well as uniform – radiation leakage points.…”

Bremsstrahlung source term estimation for high energy electron accelerators

“…Majority of photo-neutrons emitted are fast neutrons (Swanson, 1979) and hence its effect on the dose recorded in CaSO 4 : Dy TLD is evaluated. The response of CaSO 4 : Dy for fast neutrons is reported to be negligible (Weng and Chen, 1974;Pradhan et al 2002) and for thermal neutrons it is 3.8 mGy (equivalant to Co-60 gamma ray) for a neutron fluence of 10 10 n/cm 2 (Vohra et al, 1980;Pradhan et al, 2002). Since the response of CaSO 4 : Dy TLD to fast neutron is negligible and thermal neutrons is very low, the contribution of neutron dose in the experimental TLD data is neglected.…”

Experimental studies on a compact electron cyclotron resonance plasma x-ray source

“…The correction factor for the dose estimation is taken from Ref. 31. From the thermo luminescene dosimeter ͑TLD͒ measurement, at the port, x-ray dose of nearly 8.72, 5.40, and 8.85 mGy/h is estimated for the operation conditions of 1, 2, and 3 A, respectively.…”