VM Lebedev | PubMed Health

PubMed2000

Gadolinium-153 line sources

The technology for Gd-153 line source production has been developed at SSC RIAR. The source active core is made of Al-Gd2O3 composition by means of one of the following ways: either collecting pressed pellets or filling the source body with the composition followed by sintering. The composition is prepared by gadolinium salt thermal destruction on aluminium particles. The method allows setting gadolinium mass fraction (from 0.02 to 6%) with high accuracy and uniformity of distribution in the composition volume of more than 95%.

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PubMed2000

Radionuclide production using a fast flux reactor

The production of 89Sr, (32,33)P, 35S via the (n, p)-reaction, and 117mSn, 153Gd via the (n, gamma)-reaction using the BOR-60 fast flux reactor was experimentally studied. Test samples were irradiated in the active core of the BOR-60 reactor with fast neutron flux of 1 x 10(15) cm(-2) s(-1) for 40-100 effective days. Gadolinium-153 was produced in a radial blanket cell, characterized by a modified ("softened") neutron spectrum. Data on target materials, procedure of irradiated target reprocessing, radionuclide yield, and specific activity are summarized in the report. The results of the experiment showed that large-scale production of the radionuclides listed above is possible using a fast-flux reactor.

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