Process for the production of radioisotopes of selenium,申请号AU19990053127-传众专利搜索

Process for the production of radioisotopes of selenium

申请公布号：AU5312799(A)

申请号：AU19990053127

申请日期：1999.06.22

申请公布日期：2000.01.17

申请人：

TCI INCORPORATED

发明人：BORIS L. ZHUIKOV;VLADIMIR M. KOKHANYUK

分类号：G21G1/10

主分类号：G21G1/10

摘要：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 DEG 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 DEG 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.