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Radiation Protection Dosimetry 85:63-66 (1999)
© 1999 Oxford University Press

PTTL Dose Re-estimation Applied to Quality Control in TLD-100 Based Personal Dosimetry

J.L. Muņiz, V. Correcher and A. Delgado

A new method for quality control of dose performance in Personal Dosimetry using TLD-100 is presented. This method consists of the application of dose reassessment techniques based on phototransferred thermoluminescence (PTTL). Reassessment is achieved through a second TL readout of the dosemeters worn by the controlled workers, after a reproducible UV exposure. Recent refinements in the PTTL technique developed in our laboratory allow reassessing doses as low as 0.2 mSv, thus extending the reassessment capability to the entire dose range that must be monitored in personal dosimetry. After a one month exposure, even purely environmental doses can be reassessed. This method can be applied for either re-estimation of single doses or of the total dose accumulated after a number of exposures and dose measurements. Several tests to reconfirm low doses in normal working conditions for personal dosimetry have been performed. Each test consisted of several cycles of exposure and TL evaluations and a final PTTL re-estimation of the total accumulated dose in those cycles. The results obtained always showed very good agreement between the sum of the partial doses and the total reassessed dose. The simplicity of the method and the possibility of re-evaluating the doses assessed to the workers employing their own dosemeters are advantageous features to be considered in designing systems for the determination of real performance in personal dosimetry.


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A. Abraham, M. Weinstein, U. German, and Z. B. Alfassi
On the reassessment of thermal neutron doses in TLD-100 by measuring the residual dose
Radiat Prot Dosimetry, August 1, 2007; 126(1-4): 524 - 527.
[Abstract] [Full Text] [PDF]


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