Abstract
Performance characteristics of a new Harshaw 6600 thermo-luminescence dosimeter (TLD) have been investigated. Fading of 19 % of thermo-luminescence (TL) readout was observed in 90 days when TLD chips were stored at room temperature (~ 27º C). The TL sensitivities of chips in three holder types were close to that for Cs-137 for energies greater than 65 keV. The energy response of the chips/holders was within – 74 to 13% in the energy range from 18 to 662 keV, but almost energy independent within – 3 to 13 % for energy greater than 83 keV. Personal dose equivalent from TLD Reader were underestimated compared with doses evaluated taking energy response of TLD cards into account. The Harshaw TLD Reader was found to be suitable for assessing personal dose equivalent HP(10) and HP(0.07), as the TLD 6600 Reader satisfied all the performance criteria set by the manufacturer. Journal of Applied Science and Technology (JAST), Vol. 7, Nos. 1 & 2, 2002, pp. 37 – 43
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