偵測光子輻射所應用之光刺激發光劑量計(OSLD)目前常使用的材料是Al2O3 : C，降低材料成本是許多研究學者致力改進的問題，NaCl是環境中容易獲得和成本低廉的材料，亦具有OSLD的特性。由於OSLD計讀系統目前是landauer 公司製作和生產，其系統規格並無法計讀NaCl，因此本研究使用自製光刺激發光計讀儀系統來度量Al2O3 : C、NaCl兩種材料。NaCl以手動液壓機將其製作成錠狀固體並探討NaCl光子劑量計特性。本研究首先使用Al2O3 : C (nanoDot)驗證自製計讀儀之特性，而後將壓錠後之NaCl材料應用於光子輻射度量，評估NaCl OSLD於光子輻射場的再現性、均勻性和劑量特性。結果顯示，壓錠後NaCl OSLD具有以下特性，其再現性與均勻性控制在±20%的誤差範圍，此外由回火速率可知晶體本身對可見光的敏感度極高，應用此材料必需將其外部封裝嚴密。依據NaCl的消光現象(fading)曝露輻射後之計讀時間應於1天後，光子場中NaCl OSLD最低可測劑量為0.3 mGy，本研究於1 Gy以下建立其線性劑量校正曲線。壓錠後之NaCl粒徑大小固定與質量誤差較小，大幅降低計讀時產生的不穩定訊號，雖不具備重複計讀特性，可做為OSLD評估光子劑量。

The optical stimulation luminescence dosimeter (OSLD) for photon radiation detection is usually using Al2O3: C. The cost of dosimeter is also an important consideration for choosing dosimeter in radiation measurement. NaCl is an easy-to-obtain and low-cost material in the environment. NaCl has the characteristics of OSL and is possible to be used as an OSLD. Currently, the Landauer OSLD reader(microStar) is most popular used. However, this reader cannot measure NaCl crystal. Therefore, this study used the homemade reader system developed in the laboratory to measure Al2O3: C and NaCl crystal. NaCl OSLDs were made for solid pellet crystal by a hand-pressed hydraulic machine in this study. Commercial Landauer Al2O3:C dosimeters (nanoDot) were used to verify the characteristics of the homemade reader system. The solid NaCl pellets were applied in photon field to evaluate the reproducibility, homogeneity and dose characteristics of the NaCl OSLD. The results of this study show that its reproducibility and homogeneity of NaCl OSLD have ±20% deviation. In addition, the annealing rate shows that NaCl OSLD is extremely sensitive to visible light. NaCl OSLD must be tightly packaged to avoid visible light. According to the fading of NaCl OSLD, after exposing to radiation the proper reading time should be 1 day later. Lower Limit of Detection (LLD) of NaCl OSLD in the photon radiation field is 0.3 mGy. Linear dose calibration curve was built below 1 Gy. In concluded, the NaCl pellets have fixed particle size and fixed mass, this causes lower uncertainty. Although the reread property is lack for NaCl OSLD, it is still can be used as a cheap and qualified dosimeter.

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