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将镀金的VYNS膜,分别套在有机玻璃片,不锈钢片、玻璃片及紫铜环上,采用电喷涂法,电喷涂硅溶胶源衬垫,制备了四种不同材料的~(241)Am薄源。分别采用α-γ符合法,2π栅网电离室法测量放射性绝对强度、材料的反散射系数及能量半宽度分辨率。结果表明,由于有机玻璃源刚性好,几何形状规则,反散射系数小,致据的精度及分辨率都达到令人满意的要求。它与通常采用的VYNS薄源相比,具有机械加工简单、成本低、不
The gold-plated VYNS films were respectively set on plexiglass sheets, stainless steel sheets, glass sheets and copper rings. Electro-spray coating and electrospray-silica sol source liner were used to prepare four thin films of ~ (241) Am thin source . The α-γ coincidence method and 2π grid ionization chamber method were used respectively to measure the absolute intensity of radioactivity, the material’s backscattering coefficient and the energy half-width resolution. The results show that due to the good rigidity of the plexiglass source, the regular geometric shape and the small backscattering coefficient, the accuracy and resolution of the plexiglass source meet the satisfactory requirements. Compared with the commonly used VYNS thin source, it has the advantages of simple machining, low cost, no