Evaluation of the applicability of hydroxyapatite for a new disposable dosimeter using ESR

Kitamura, Yoshimasa; Oka, Toshitaka   ; Seito, Hajime*; Yokozuka, Eri*; Nagasawa, Naotsugu*; Kumagai, Yuta   ; Watanabe, Masayuki   

We attempt to fabricate a new disposable solid-state dosimeter capable of detecting the range from mGy to Gy as well as tooth enamel by applying ESR dosimetry technique. In this study, we evaluate the applicability of hydroxyapatite, which is the main component of teeth, to the new dosimeter. The intensity of carbonate radicals was proportional to absorbed dose and the dose-response curve showed a good linear relationship in the range 0-200 Gy, and the detection limit was estimated to be 100 mGy, slightly higher than that for human teeth.