Sublimatographic Separation of Fission Products by β-diketone Complexes

—FP chelate complexes produced directly by recoil effects—

Abstract

The sublimatographic separation of volatile β-diketonate complexes of fission products produced directly by the recoil atoms of fission products under exposure of a mixture of M (β-diketone) _nand U₃O₈ on neutron, was carried out.
When Fe (dpm) ₃ and Fe (pta) ₃ were used as the catcher chelates, both samples, the subli mated radioactive chelates located at the one zone, and the positions agreed with the deposited position of inactive each catcher chelate. The unclides presented in the zone were almost ⁹⁷Zr-⁹⁷Nb, ¹⁰⁵Ru and ⁹⁹Mo-^99mTc. When Y (dpm) ₃ was used as the catcher chelates, the sublimated radioactive chelates located at the one zone, and the zone agreed with the deposited position of inactive catcher chelates, the presented nuclides in the zone were mainly ⁹⁷Zr-⁹⁷Nb, ⁹⁵Zr-⁹⁵Nb, ¹⁰⁵Ru, ¹⁰³Ru, ¹⁴³Ce, ¹⁴¹Ce, ⁹³Y, ⁹²Y and ¹⁴⁷Nd. In the case of Y (pta) ₃, the sublimated radioactive chelates located at the two zones. The zone at higher temperature side agreed with the deposited position of inactive catcher chelates, and the nuclides presented in this zone were the same as in the case of Y (dpm) ₃. On the other hand, it was observed that mainly carrier free states of ⁹⁷Zr-⁹⁷Nb were deposited at the zone of lower temperature side. When Ni (acac) ₂ was used as the catcher chelates, the sublimated radioactive chelates located at the same pattern as Y (pta) ₃, but the amount of deposited zones of activity was quite low.
As a U₃O₈ target was diluted with Fe (dpm) ₃ catcher chelates, the yield of deposited ⁹⁷Zr and ⁹⁵Zr nuclides was enhanced, to about 50%.