熱發光材質應用於作為輻射劑量計已行之有年，而質子在研究及醫療上
的重要性也漸漸地受到重視。研究主要觀察熱發光劑量計銩活化氟化鈣（

CaF2:Tm, TLD-300）及鏑活化氟化鈣（CaF2:Dy, TLD-200）對質子的回應

，可作為日後於質子治療時，劑量測定的參考。

研究的質子源係由范氏加速器所產生，其能量範圍係在0.7到3.0 MeV 之

間。實驗的方法則是改變所照射的質子能量、質子數目及照射的質子通量

，以便瞭解各種照射情形對熱發光材質的影響。結果顯示CaF2:Tm 的第二

峰與第五峰不但易於辨識，且輝光峰高度比值與照射質子能量呈良好的線

性關係，所以很適合用來測定質子的能量。CaF2:Dy 由於對質子的靈敏度

極高，因此適於用來測量微量的質子。

Thermoluminescent material has long been used to determine the

radiation dose. The proton research and therapy are becoming

more important, now. In our study the response of CaF2:Tm and

CaF2:Dy to protons will provide the dose data for proton therapy

in future.

The source of proton beam was from by a Van de Graaff

accelerator with an energy range between 0.7 to 3.0 MeV. We

have analyzed the influences of various proton energies, proton

number and fluence on the response of CaF2:Tm and CaF2:Dy. The

results show that CaF2:Tm with well defined peak 2 and peak 5 is

an optimum dosimeter for the determination of proton energy by

means of peak height ratio of peak 2 and peak 5. The more

sensitive CaF2:Dy is an optimum dosimeter for measuring low-

level proton radiation

Foe the photon experiment, the new material MgB4O7:Dy,Na was

investigated with reference to annealing procedure. This new

material can approximately determine the absorbed dose of human

body since its effective atomic number is close to that of

tissue. Its glow curve is rather simple, with only one well

defined peak about 210o C. The proper annealing procedure for

this material will insure its applications. The method used was

to analyze the reproducibility while exposed to gamma. After

proper annealingost residual TL of MgB4O7:Dy,Na can be

eliminated. The results show that at 550o C for 2 h, the

annealing procedure can retain the least TL residual, provide

high reproducibility and good linearity of a large dose range.