![]() ![]() The discovery of californium came in the era of the syntheses and identifications of other transplutonium elements, following the end of World War II. Purification and handling of the highly radioactive californium material created additional challenges in the production of these sources.« less The ammonium acetate deposition was run with a current of 1.0 amp, resulting in a 91.5% deposition yield. The 252Cf material was initially purified using traditional ion exchange media, such as AG50-AHIB and AG50-HCl, and further purified using a TEVA-NH 4SCN system to remove any lanthanides, resulting in the recovery of 3.6 0.1 mg of purified 252Cf. ![]() This was the largest single electrodeposition of 252Cf ever prepared. Another deposition method, ammonium acetate, was used to produce a deposition containing 1.7 0.1 Ci of 252Cf onto a stainless steel substrate. After the source capsules were opened, the californium was purified and then electrodeposited using the isobutanol method onto thin titanium foils for use in an accelerator at the Joint Institute for Nuclear Research in Dubna, Russia. These sources have decayed for over 30 years, thus providing material withmore » a very high 251Cf-to- 252Cf ratio. The californium material was recovered from aged 252Cf neutron sources in storage at ORNL. ![]() This neutron-rich isotope, 251Cf, provides target material for SHE research for the potential discovery of heavier isotopes of Z=118. A californium product that was decay enriched in 251Cf was recovered for use in super-heavy element (SHE) research. Californium Electrodepositions at Oak Ridge National LaboratoryĭOE Office of Scientific and Technical Information (OSTI.GOV)Įlectrodepositions of californium isotopes were successfully performed at Oak Ridge National Laboratory (ORNL) during the past year involving two different types of deposition solutions, ammonium acetate (NH 4C 2H 3O 2) and isobutanol ((CH 3) 2CHCH 2OH). ![]()
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