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本工作用中国原子能科学研究院HI-13串列加速器提供的32S离子辐照CR-39样品,产生潜径迹,用紫外灯敏化后在氢氧化钠溶液中蚀刻,使潜径迹成为具有一定孔径的孔(洞)。用真空充氩气的方法在核径迹孔样品表面镀银纳米颗粒。电子扫描电镜图片显示,氩气压强在50～100Pa之间时,银纳米颗粒直径约为60～100nm,纳米颗粒形成球状团簇的大小为3μm。在红外光区(2.5～25μm)测量镀膜样品的反射率,测量结果表明,CR-39表面的核径迹与银纳米颗粒能将红外光区(8.0～25μm)的反射率降低到0.9%,与未经改性的CR-39比较,减低了82%。在5.8和7.8μm处,CR-39的本底反射率分别从9.0%和13.0%降低到了5.0%和6.8%。
In this work, CRS samples were irradiated by 32S ion supplied by HI-13 tandem accelerator of China Institute of Atomic Energy to generate a potential track which was sensitized with UV lamp and then etched in sodium hydroxide solution to make the potential track be a Aperture holes (holes). The sample was filled with silver nanoparticles on the surface of the nuclear track samples by vacuum argon gas. Electron scanning electron microscopy images show that when the argon pressure is between 50 ~ 100Pa, the diameter of the silver nanoparticles is about 60 ~ 100nm, the size of the nanoparticles forming the spherical clusters is 3μm. The reflectivity of the coated samples was measured in the infrared region (2.5 ~ 25μm). The measurement results show that the reflectivity of the CR-39 surface can be reduced to 0.9% in the infrared region (8.0 ~ 25μm) Compared with the unmodified CR-39, it decreased by 82%. At 5.8 and 7.8 μm, the background reflectivity of CR-39 decreased from 9.0% and 13.0% to 5.0% and 6.8%, respectively.