Ishikawa Ippei, Kimoto Atsushi, Kiyohara Shuji
National Institute of Technology (KOSEN), Maizuru College, Kyoto 625-8511, Japan.
Materials (Basel). 2023 Aug 2;16(15):5413. doi: 10.3390/ma16155413.
PADC is well known as a highly sensitive solid-state nuclear track detector. A proposal is for a radiation education method that utilizes these characteristics. A significant issue in the proposed educational method using PADC is the time-consuming etching process. This study attempted to reduce etching time by using a homemade PADC. The experimental results have revealed that the homemade PADC achieves faster etch pit enlargement compared to BARYOTRAK (commercial PADC). An attempt was made to enlarge etch pit diameters rapidly by irradiating UV at a wavelength of 253.7 nm and etching with NaOHaq/ethanol solution. The results revealed that UV irradiation at a wavelength of 253.7 nm, after etching, resulted in etch pit diameters several times larger than those obtained in conventional methods within the same etching time. Therefore, UV irradiation and short-time etching with NaOHaq/ethanol solution proved to be effective. This study also investigated the effects of fading on the PADC during its storage period after UV irradiation. The experimental results confirmed that the etch diameters shrank by approximately 30% after 2 months of storage. However, considering the enlargement effect of the etch pit diameters due to UV irradiation, it can be concluded that UV irradiation is practical for radiation education experiments.
聚碳酸酯探测器（PADC）作为一种高灵敏度的固态核径迹探测器而广为人知。有人提出了一种利用其这些特性的辐射教育方法。在使用PADC的拟议教育方法中，一个重要问题是蚀刻过程耗时。本研究试图通过使用自制的PADC来减少蚀刻时间。实验结果表明，与BARYOTRAK（商用PADC）相比，自制的PADC蚀刻坑扩大得更快。有人尝试通过照射波长为253.7 nm的紫外线并用氢氧化钠水溶液/乙醇溶液蚀刻来快速扩大蚀刻坑直径。结果表明，蚀刻后照射波长为253.7 nm的紫外线，在相同蚀刻时间内，蚀刻坑直径比传统方法获得的蚀刻坑直径大几倍。因此，紫外线照射和用氢氧化钠水溶液/乙醇溶液进行短时间蚀刻被证明是有效的。本研究还调查了紫外线照射后PADC在储存期间褪色的影响。实验结果证实，储存2个月后蚀刻直径缩小了约30%。然而，考虑到紫外线照射导致蚀刻坑直径的扩大效应，可以得出结论，紫外线照射对于辐射教育实验是可行的。
