Process for the production of radioisotopes of selenium

Details Process for the production of radioisotopes of selenium Process for the production of radioisotopes of selenium

1998-06-26

1999-11-16

Behrend, Harvey E.

Induced nuclear reactions: processes, systems, and elements

Nuclear transmutation

By charged particle bombardment

376192, 376190, G21G 110

Patent

active

059870877

ABSTRACT:
A beam of accelerated charged particles irradiates an arsenide target, such as gallium arsenide or aluminum arsenide, to produce radioisotopes of selenium and other radionuclides. The irradiated target is placed in a niobium, tantalum, or graphite vessel and inserted into a tube. Metallic reagents consisting of an alloy of iron, nickel, and chromium (stainless steel) or metallic aluminum are mixed with the target material. The target is then heated to 1000-1100.degree. C. The metallic reagents prevent arsenic sublimation, destroy the crystalline structure of arsenide target, and remove other impurities, such as zinc-65. The target is then heated a second time to about 1300.degree. C. causing the selenium-72 to sublime and be deposited on a cooler wall of the tube or on a catcher foil surface. The deposited selenium-72 is recovered from the tube or foil.

REFERENCES:
patent: 5204072 (1993-04-01), Phillips
patent: 5371372 (1994-12-01), Phillips
patent: 5405589 (1995-04-01), Phillips
Appl. Radiat. Isot., vol. 39, No. 10, pp. 1085-1091, Mushtag et al., 1988.
Dennis R. Phillips, et al; "Electrolytic Separation . . . RbBr Targets"; 1987; pp. 521-525.
Regin Weinreich et al; "Production of . . . Energy Protons"; Jan. 1989; pp. 146-147.

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