New method for preparing radionuclide 98Tc

Abstract

The invention discloses a new method for preparing radionuclide 98TC, which is mainly technically characterized by comprising the following steps of: dissolving a Mo target irradiated by deuteron (2H) by using H2O2 sold on the market, converting the dissolved Mo and Tc into Na2MoO4 and Na2TCO4 by using NaOH, and maintaining the basicity of the solution at about 10 percent; and in the process of separating the MO from the 98Tc, putting the Na2MoO4 solution containing 98TC on a Dowex-1 anion exchange resin column, eluting the Mo from the Dowex-1 anion exchange resin column by using 9.5 to 10.5 weight percent NaOH, eluting other impurities by using 1.5 to 2.5 mol / L HCL and 2 to 3 mol / L HNO3 respectively, and finally eluting the Dowex-1 anion exchange resin column by using 7.0 to 8.0 mol / L HNO3 in a volume which is 5.0 to 8.0 times that of the exchange column to obtain high-purity Na2TcO4 solution containing the 98Tc. In the 98Tc prepared by the invention, the atomic ratio of the Mo to the Tc is less than 1 percent, and the radioactive nucleus purity of the Tc is over 99.9 percent; and the preparation method has the advantages of simple operational procedure and high safety.

Description

technical field [0001] The present invention relates to the technical field of isotope, more specifically, relate to a kind of through d nucleus ( 2 H) Irradiation 98 Preparation of Radionuclide from Mo Target 98 Tc's method. Background technique [0002] 98 Tc is a nuclide with the longest half-life among Tc isotopes, reaching 4.2×10 6 a. 98 Tc does not exist in nature, and can only be produced in nuclear-like activities such as nuclear explosions. therefore, 98 Tc can be used for reanalysis of nuclear test data, as well as geochemistry and nuclide migration studies of technetium. 98 Tc is generally produced through accelerators. Produced with an accelerator 98 Tc, the method of prior art mainly adopts proton ( 1 H) and helium nuclei ( 3 He) bombards metal Mo. It has been reported in the literature that the use of 22MeV protons ( 1 H) Bombard the Mo target to obtain about 10 μg of 98 Tc, and the isotopic abundance composition of Tc is given ( 95 Tc: ~0.5%, 9...

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Problems solved by technology

[0004] Preparation of radionuclides against existing technologies 98 The present situation of Tc, the object of the present invention aims to provide a kind of d nucleus ( 2 H) Irradiating and bombarding Mo targets to produce Tc / Mo atomic ratio less than 1% and radionuclear purity greater than 99.9% 98 Tc (contains 95 Tc, 97 Tc and 99 A new method of isotopes of Tc such as Tc), while overcoming the problems of cumbersome operation, large volume of eluent, and poor safety in the separation of Mo and Tc in the prior art

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