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Influence of the irradiation systems on beta-ray calibration for dosemeters; Characteristics of the beta-ray irradiation systems at the Facility of Radiation Standards (FRS) in JAEA

Yoshitomi, Hiroshi   ; Kowatari, Munehiko

With regard to the calibration of dosemeters with $$^{90}$$Sr/$$^{90}$$Y source, influence of the difference of beta-ray irradiation systems on the calibration results has been investigated. Two different types of beta-ray irradiation systems installed at the Facility of Radiation Standards (FRS) in the Japan Atomic Energy Agency (JAEA) were chosen for the comparison. $$^{90}$$Sr/$$^{90}$$Y sources of each system showed different depth-dose profiles reflecting their source structure. The difference in depth-dose curves implied the calibration results would be affect in the case of a thick dosemeter in particular. In order to confirm the influence of the difference of depth-dose curves, optically stimulated luminescence ring type dosemeters were irradiated with both systems. The results showed the calibration factors were slightly different as predicted from the depth-dose curves.

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