| Abstract | A new thermoluminescence dosimetry system for environmental applications was tested, which used high sensitivity lithium fluoride (TLD-100H). The energy response of the bare thermoluminescence dosimeters (TLDs) was measured for photon beams with mean energies from 24 keV to 1.1 MeV, and the results were compared with standard lithium fluoride (TLD-100). The energy response was also measured for TLD-100H card-mounted dosimeters encapsulated in Teflon®, used as part of the Harshaw Type 8855 environmental dosimeter. The EGSnrc Monte Carlo system was used to calculate the dose to the TLDs in both the bare chip holder and the 8855 dosimeter, in order to calculate the thermoluminescence per unit of absorbed dose to the TLDs. The results were broadly consistent with existing data, with the response of both TLD materials correlating with the ionization density of the photon beams. |
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