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本文的工作是利用扫描电镜的扫描电子束,轰击Cu、Al和C靶,以产生不同波长的X射线,用这种软X射线投射到生物样品上,可以得到生物试样(树叶和蚊子)的X光透射像。我们曾用Cu做靶,产生X射线照射到树叶等生物样品上,得到了它们的图像。本工作报导利用日立公司x—650电镜,在20kV电压,样品电流100nA,曝光时间20分钟,8盲色片作为接收底片,用Cu、Al和C靶进行比较,对家蚊和树叶进行照射,得到图1的X射线透射像。从图中可以看到,当实验条件不变只改变不同的靶材料时,图像的衬度不同。C作为靶材料所得到树叶的图像不仅可清楚地显示粗,细叶脉的形貌还可以看到叶片上木同衬度的细节,Al靶差些,Cu靶更差,只能看到树叶的整体形貌,其原因主要是由于用C靶做为X光射发靶,可产生4.4nm波长的标识X光,
The work of this paper is to scan Cu, Al and C targets by scanning electron microscope to produce X-ray with different wavelength. By using this soft X-ray to project onto biological samples, biological samples (leaves and mosquitoes) X-ray transmission image. We used Cu as a target to generate X-rays on biological samples such as leaves and get their images. This work reported the use of Hitachi x-650 electron microscope, at a voltage of 20kV, the sample current of 100nA, exposure time of 20 minutes, 8 blind color film as the receiving film, compared with Cu, Al and C targets, mosquito and leaves irradiation, The X-ray transmission image of FIG. 1 was obtained. Can be seen from the figure, when the experimental conditions change only different target material, the contrast of the image is different. C as a target material obtained from the leaves of the image can not only clearly show the morphology of fine veins can also see the leaf with the contrast of the details of the wood, Al target worse, Cu target worse, only the leaves The overall appearance, the reason is mainly due to the use of C target as X-ray emission target, can produce 4.4nm wavelength identification X-ray,