A method for producing .sup.229Th uses .sup.230Th as a target material. .sup.229Th can be formed from .sup.230Th using energetic particles, including neutron, gamma ray, proton or deuteron bombardment.
STATMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
 The United States Government has rights in this invention pursuant to Contract No. DE-AC05-00OR22725 between the United States Department of Energy and UT-Battelle, LLC.