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Magnetohydrodynamic electrodeposition method for preparing high-resolution alpha radiation source

A technology of magnetohydrodynamics and α-radiation source, applied in electrolysis components, electrolysis process, cells, etc., can solve the problem of low energy resolution, achieve precise control of electrode spacing, accurate and convenient control of safe operation, and convenient control of anode speed Effect

Active Publication Date: 2019-06-18
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in some radioactive substances containing multiple radionuclides, the energy spectra of these radionuclides are superimposed, and the energy resolution of radioactive sources prepared by traditional electrodeposition methods is not high in the alpha energy spectrum measurement, so it is urgent to establish A new radioactive source preparation method that can significantly improve the energy resolution of the prepared source

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  • Magnetohydrodynamic electrodeposition method for preparing high-resolution alpha radiation source
  • Magnetohydrodynamic electrodeposition method for preparing high-resolution alpha radiation source
  • Magnetohydrodynamic electrodeposition method for preparing high-resolution alpha radiation source

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preparation example Construction

[0027] In the magnetohydrodynamic electrodeposition method for preparing a high-resolution alpha radiation source provided by the present invention, a permanent magnet is placed outside the deposition tank, and a magnetic field is applied to the deposition system. During the deposition process, a magnetic field and an electric field coexist to generate a The Lorentz force perpendicular to the direction of the magnetic field and the electric field, the existence of this force can accelerate the liquid phase mass transfer inside the deposition liquid, reduce the thickness of the cathode diffusion layer, and can significantly improve the deposition rate while increasing the deposition efficiency. source resolution.

[0028] The magnetohydrodynamic electrodeposition method for preparing a high-resolution alpha radiation source mainly includes the following steps:

[0029] (1) A permanent magnet capable of applying a magnetic field to the deposition system is provided outside the d...

Embodiment 1

[0043] This embodiment provides a specific MHD electrodeposition method for preparing a high-resolution alpha radiation source, which can be carried out as follows.

[0044] (1) Pretreatment of cathode deposition source sheet

[0045] Clean the stainless steel deposition source piece that has been mechanically polished to remove scale, first with a small amount of decontamination powder, then with deionized water, then with a small amount of sodium carbonate, and then with deionized water, and so on until the surface of the cathode is uniform. until the water film. After cleaning with absolute ethanol, store it in absolute ethanol until use. The diameter of the cathode deposition source sheet is 24 mm, and the diameter of the active area during deposition is 20 mm.

[0046] (2) Preparation of electrolyte

[0047] Prepare an ammonium sulfate solution with a concentration of 0.5 mol / L, adjust its pH value in the range of 2-2.5 with a (1+10) sulfuric acid solution, and use it ...

Embodiment 2

[0059] The magnetohydrodynamic electrodeposition method for preparing a high-resolution α-radiation source in this embodiment is basically the same as the process of Example 1. The difference from Example 1 is that the anode rotation speed is constant at 40r / min, and the anode and cathode deposit the source sheet The distance between them is fixed at 9mm, and the added nuclide is that of the nitric acid system. 238 U solution. Apply permanent magnets symmetrically on both sides of the deposition tank, the magnetic flux density of the two permanent magnets is 0.7T, and the distance between the center of the cathode deposition source sheet and the center of the axial surface of the permanent magnets on each side is 14mm. The device is left-right symmetrical, not only can apply magnetic field symmetrically on both sides of the deposition tank, but also can conveniently adjust the distance between the permanent magnet and the deposition tank, so as to realize the comprehensive stu...

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Abstract

The invention belongs to the technical field of radioactive source preparation, and particularly relates to a magneto hydrodynamics electro-deposition method for preparing a high-resolution alpha radioactive source. The method comprises the following steps that a permanent magnet is placed at the outside of a deposition tank, and a magnetic field is exerted on a deposition system; under the condition of the coexistence of the magnetic field and an electric field during a deposition process, Lorentz force perpendicular to the directions of the magnetic field and the electric field is generated; the presence of the Lorentz force accelerates liquid phase mass transfer in deposition liquid, and the thickness of a cathode diffusion layer is decreased; and while accelerating the deposition rate and improving the deposition efficiency, the resolution of the prepared source can be remarkably improved. According to the magneto hydrodynamics electro-deposition method for preparing the high-resolution alpha radioactive source, the problem that the energy resolution of a radioactive source prepared by a traditional electro-deposition method is low is solved, and the ordinary electro-deposition method for preparing the radioactive source is greatly improved and optimized.

Description

technical field [0001] The invention belongs to the technical field of radioactive source preparation, and in particular relates to a magnetohydrodynamic electrodeposition method for preparing a high-resolution alpha radioactive source. Background technique [0002] Alpha spectroscopy plays an important role in the qualitative and quantitative analysis of actinides. At present, α-spectroscopy has been widely used in radioactivity measurement in various fields, such as nuclear safeguards analysis, nuclear safety, nuclear fission, nuclear data and environmental detection and other fields. When performing α energy spectrum measurement on α radiation sources, the measurement accuracy mainly depends on the quality of the prepared α radiation sources. High-quality solid radiation sources usually form a uniform thin layer of radioactive substances. Among the various techniques for preparing radioactive sources at present, electrodeposition is often used to prepare extremely thin s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D5/04C25D17/02C25D21/12
CPCC25D5/04C25D17/02C25D21/12
Inventor 张鹏林敏徐利军夏文张卫东罗瑞陈义珍
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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