Two dimensional radioluminescence (RL) films were investigated for application in proton and carbon therapy dosimetry. The films are made of Al₂O₃:C,Mg micro powder in two sizes (38 µm and 7 µm) mixed with a water-equivalent binder. The films were irradiated behind different thicknesses of solid slabs and behind wedge shaped plastic absorbers. Bragg curves presented quenching effect attributed to the non-linear response of the RL signal as a function of proton linear energy transfer (LET). Experimental data and Monte Carlo simulations were utilized to acquire a quenching correction method, adapted from Birks’ formula, to restore the linear dose response for particle therapy beams. The method for quenching correction was applied, reaching an agreement at the Bragg peak of 3 % for films with 38 µm median grain size phosphor and 1.5 % for films with 7 µm median grain size phosphor for the proton beams; and 2 % for films with 38 µm median grain size phosphor and 3 % for films with 7 µm median grain size phosphor for the carbon charged particles.

研究了二维放射发光 (RL) 薄膜在质子和碳治疗剂量学中的应用。薄膜由 Al ₂ O _3制成:C,Mg 两种尺寸（38 µm 和 7 µm）的微粉与水当量粘合剂混合。薄膜在不同厚度的实心板后面和楔形塑料吸收器后面进行辐照。布拉格曲线呈现淬火效应，归因于 RL 信号的非线性响应作为质子线性能量转移 (LET) 的函数。实验数据和蒙特卡洛模拟用于获取淬火校正方法，该方法改编自 Birks 公式，以恢复粒子治疗束的线性剂量响应。应用淬火校正方法，对于质子束，对于具有 38 µm 中值粒径荧光粉的薄膜和具有 7 µm 中值粒径荧光粉的薄膜的布拉格峰达到 3% 的一致性；