Method for producing actinium-225 from a radium-226 target by shielding the target from thermal neutrons in a moderated nuclear reactor
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United States of America Patent
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Jun 20, 2023
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app pub date -
Dec 17, 2021
filing date -
Jun 21, 2019
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Abstract
A method for the manufacture of Actinium-225 from a Radium-226 containing material. Radium-226 containing starting target material is shielded with a thermal neutron absorption shield and is subjected to neutron irradiation from a moderated nuclear reactor. Radium-226 is thereby converted into Radium-225 to provide a Radium-225-containing material. The Radium-225 in the Radium-225 containing material is allowed to decay into Actinium-225, and the Actinium-225 is isolated from the Radium-225 containing material. The neutron absorption shield shields the starting target material from neutrons having an energy in the range of 20 eV to 1000 eV.
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