Extremity dosimeter studies

Finger rings employing a single TLD-700 chip have served as the routine extremity dosimeter for the past several years. The response characteristics of the finger ring are described in this study. Proper annealing is crucial to accurate and precise readout and dose assignation. The standard PNL annealing procedure of 4000C for one hour followed by 1000C for two hours appears best; reader annealing is unacceptable, showing extremely poor precision. Although the rings are in the main suitable from a human factors standpoint, adjustable size is suggested for future models. Also, it should be noted that the rings are not suitable for neutron dosimetry, but can be used for beta dosimetry with a suitable correction factor