|
KMID : 1038720160270020098
|
|
Progress in Medical Physics
2016 Volume.27 No. 2 p.98 ~ p.104
|
|
|
Changes of Optically Stimulated Luminescence Dosimeter Sensitivity with High Dose
|
|
Han Su-Chul
Choi Sang-Hyoun
Park Seung-Woo
Jung Hai-Jo
Ji Young-Hoon
Kim Kum-Bae
|
|
|
Abstract
|
|
|
|
We investigated the effect of high dose on the sensitivity of optically stimulated luminance dosimeters (OSLDs) on Co-60 gamma rays and used a commercial OLSD (Landauer, Inc., Glenwood, IL). New OSLDs were chosen arbitrarily and were irradiated with 1 Gy repeatedly. We confirmed the change in the radiation sensitivity after repeated irradiation. The OSLD sensitivity increased up to 3% after irradiating for seven times and decreased continuously after the eighth time. It dropped by approximately 0.35 Gy per irradiation. Finally, after irradiating for 30 times, the OSLD sensitivity decreased by approximately 7%. When the OSLDs were irradiated 10 times with 1 Gy after their irradiation using a high dose of 15 Gy and 30 Gy, their sensitivity decreased by 6% and 12%, respectively, compared to that before high-dose irradiation. The change in the OSLD sensitivity with a high dose could be modeled by an exponential equation. We confirmed the radiation sensitivity variation caused by a high dose, and the irradiation history of dosimeters was considered to reuse OSLDs irradiated with a high dose.
|
|
|
KEYWORD
|
|
|
Optically stimulated luminescence dosimeter sensitivity, High dose, Co-60
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
 
|