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Self-supporting 61Ni isotope target preparing method

An isotope target and isotope technology, which is applied in the field of preparation of self-supporting 61Ni isotope targets, can solve the problems of easy cracking, increase the manufacturing difficulty, easy cracking of self-supporting targets, etc., and achieve the effect of cost saving

Active Publication Date: 2015-07-22
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reasons are: commercial 61 Ni isotope raw materials are generally in the form of powder, and it is not easy to prepare foil targets; self-supporting targets are easily broken when the area is large and the target thickness is thin, and it is easy to break during the production process, which further increases the difficulty of production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a self-supporting 61 The preparation method of Ni isotope target, this method comprises the following steps:

[0027] (1) Condensation of isotope powder

[0028] In a vacuum of 2.8×10 -4 In the vacuum chamber of Pa, the electric heating device will be used to 61 The Ni isotope powder material is heated to 1450°C to evaporate and condense on the tantalum needle collector. Condensation and agglomeration of isotopic raw materials.

[0029] The heating process of the electric heating device is as follows: the heating current is increased at a rate of 3A per minute, and the heating 61 After the Ni isotope powder reaches 1450°C, stop increasing the current and keep the current for 30 minutes, then reduce the current to 0;

[0030] (2) Alternate rolling and vacuum annealing for 3 times

[0031] The agglomerate obtained in step (1) 61 Ni isotopic materials, rolling and vacuum annealing process to make it rolled into a foil, and rolling and vacuum annealing are carried ou...

Embodiment 2

[0037] The method is the same as in Example 1, except that the annealing temperature in step (2) is 600° C., and the time is 35 minutes; the rolling process is carried out in a roll mill, and the roll spacing is initially set to 2 mm.

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Abstract

The invention belongs to the technical field of targets, and discloses a self-supporting 61Ni isotope target preparing method. The method includes the steps that (1) condensation of isotope powder is conducted; (2) rolling and vacuum annealing are conducted alternately 2 to 5 times; (3) rolling is conducted. By means of the method, 61Ni isotope targets with the area capable of reaching 600 mm<2> and the thickness capable of being as small as 0.5 mum, and thus the material utilization rate reaches as high as 95%.

Description

technical field [0001] The invention belongs to the technical field of target preparation, in particular to a self-supporting 61 Preparation method of Ni isotope target. Background technique [0002] 61 Ni is one of the important nuclear materials, 61 The (n, α) reaction cross-section data of Ni (that is, the α-particle emission nuclear reaction cross-section data caused by monoenergetic fast neutrons) is useful for the improvement of nuclear reaction model theory, nuclear energy development, nuclear engineering applications, development and design of nuclear devices, and nuclear test diagnosis Analysis plays an important supporting role and can be used to quantitatively analyze the radiation damage (helium embrittlement, etc.) of accelerators and reactor structural materials. 61 The Ni target should meet the following requirements: ① Thin, self-supporting (that is, no substrate). In order to minimize the energy loss and self-absorption of α particles when they are emitt...

Claims

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Application Information

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IPC IPC(8): B22F3/18B22F3/10C22F1/10
Inventor 樊启文杜英辉张榕胡跃明
Owner CHINA INSTITUTE OF ATOMIC ENERGY