A composition and method for applying a hydrophobic protective coating on the radiation input surface of CsI(Tl) crystals is proposed. The coating is a composition of polymer (fluoroplastic varnish) and solvent (ethyl acetate). The optimal composition of the coating composition with a thickness of ~2 µm was determined. The method of application involves the preliminary exposure of the sample in pairs of hexamethyldisilazane to increase the adhesion of the coating to the surface. It is shown that the replacement of a 5-μm-thick acrylic film with a 2-μm-thick fluoroplastic coating allows an increase in the light output of the α-detector by 14%, while the energy resolution improved from 6.28 to 4.96%.

中文翻译：

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CsI（Tl）晶体的保护性疏水涂层

提出了在CsI（Tl）晶体的辐射输入表面上施加疏水性保护涂层的组合物和方法。该涂层是聚合物（氟塑料清漆）和溶剂（乙酸乙酯）的组合物。确定厚度为〜2μm的涂料组合物的最佳组成。施用方法涉及将样品预先以六甲基二硅氮烷成对暴露，以增加涂层对表面的附着力。结果表明，用2μm厚的氟塑料涂层代替5μm厚的丙烯酸膜可以使α-探测器的光输出提高14％，而能量分辨率从6.28提高到4.96％ 。