Device used for making large-area radioactive source

Abstract

The invention belongs to the radioactive source making technology field and discloses a device used for making a large-area radioactive source. The device mainly comprises a lifting platform vehicle, a leveling table, a plating bath, a plating sheet, a plating liquid protection frame, a power source, a plating pen, a plating pen support and a two-dimensional translation device, wherein the bottom portion of the lifting platform vehicle is provided with rollers, the vehicle body is provided with a rectangular lifting board, the leveling table is arranged above the lifting board, the bottom portion of the leveling table is provided with adjusting pins capable of realizing micro height adjustment, the plating bath is a rectangular one with an opening at the upper portion and is arranged above the leveling table, the dimension of the plating bath is not smaller than the dimension of the plating sheet, the plating sheet is a cathode and is in the plating bath, the plating sheet is connected with a negative electrode of the power source through a cathode connection wire, periphery of the plating sheet is provided with the plating liquid protection frame, the plating pen is taken as an anode, the material of the plating pen is graphite, the plating pen is arranged below the plating pen support, and the plating pen is connected with a positive electrode of the power source through an anode connection wire. The device has advantages of good uniformity, high electro-deposition efficiency, easy operation, relatively low cost and large active region area.

Description

technical field [0001] The invention belongs to the technical field of radioactive source preparation, and in particular relates to a device for preparing a large-area radioactive source. Background technique [0002] In order to detect large-area α and β surface pollution instruments, especially the detection area is up to 1000cm 2 To calibrate the pollution meter, it is necessary to prepare a large-area radioactive standard source. Traditional methods for preparing large-area radioactive sources include molecular electroplating, slurry laying and electrodeposition. Among them, the molecular electroplating method has many advantages compared with other electroplating methods, but because the anode used in the general electroplating method is mainly a single platinum wire, a coiled platinum wire or a platinum mesh, it is difficult to prepare radioactive sources with a large area. Ensure its flatness (that is, keep the distance between cathode and anode constant), especiall...

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Problems solved by technology

But there are following problems in this method and its device: 1) prepared 241 The maximum deposition efficiency of the Am radioactive source is 46.1%, the efficiency is low, and more waste liquid is produced; 2) One of the most important indicators of a large-area source is uniformity, and the brush-plating platform is not mentioned in this method and in the device used The structure of the plate, and how to level the plate to ensure that the distance between the cathode and the anode is fixed; 3) The device used uses a peristaltic pump to transport the plating solution, and the excess plating solution flows to the liquid storage tank below and is reused. The flow of the plating solution will cause a certain disturbance to the process of radionuclide electrodeposition, and will also cause a certain amount of scouring to the unstable deposits. The electroplating efficiency is low, and the radioactive plating solution is easy to splash when it flows down from the brush plating platform. , can easily cause radioactive contamination of surrounding objects

4) In the article, only radioactive sources with an active area of ​​100mm*150mm are prepared, and for areas as large as 1000cm 2 The preparation method of the radioactive source (that is, the large-area radioactive source in this application) does not involve

[0004] In the current public literature, there is no disclosure of using electroplating technology to prepare an area as large as 1000cm 2 The preparation method of the radioactive source and the device used

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