Rapid separation of individual lanthanide elements from mixed fission products

Technical Report · Sat Nov 01 04:00:00 EST 1980

DOI:https://doi.org/10.2172/6721380· OSTI ID:6721380

Baker, J. D.

A microprocessor-controlled radiochemical separation system has been developed to separate lanthanide elements rapidly from fission products. The system is composed of two high performance liquid chromatography columns coupled in series by a stream-splitting injection valve. The first column separates the lanthanide group by extraction-chromatography using dihexyldiethylcarbamylmethyleneophoshate (DHDECMP) adsorbed on Vydac C/sub 8/ resin. The second column isolates the individual lanthanide elements by cation exchange using Aminex A-9 resin with ..cap alpha..-hydroxyisobutyric acid (..cap alpha..-HIBA) as the eluent. With this system, the fission-product lanthanide isotope /sup 158/Sm has been identified for the first time. It was produced from a spontaneously fissioning /sup 252/Cf source. Twenty-seven gamma-rays have been assigned to this activity which decays with a half-life of 5.51 +- 0.09 min. The /sup 158/Sm assignment is based upon the radiochemical separation of the Sm fraction from the lanthanide fission products and the observation of the growth and decay of the 45.9 min /sup 158/Eu daughter from an initially pure 5 min parent. The emission probability of the 324-keV gamma ray of /sup 158/Sm was also determined, from the growth and decay of the /sup 158/Eu daughter, to be 10.6 +- 1.2 gamma rays per 100 decays. Several new gamma rays have been identified by half-life as belonging to the decay of /sup 157/Sm. Gamma-ray energies and relative intensities for /sup 157/Sm and /sup 158/Sm are reported.

• Research Organization: EG and G Idaho, Inc., Idaho Falls (USA)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 6721380
• Report Number(s): EGG-PHYS-5269
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400703* -- Radiochemistry & Nuclear Chemistry-- Radioisotope Production
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BUTYRIC ACID
CARBOXYLIC ACIDS
CATIONS
CHARGED PARTICLES
CHROMATOGRAPHY
DHDECMP
ELEMENTS
ESTERS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXTRACTION CHROMATOGRAPHY
FISSION PRODUCTS
GAMMA SPECTROSCOPY
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INORGANIC ACIDS
INTERMEDIATE MASS NUCLEI
ION EXCHANGE CHROMATOGRAPHY
IONS
ISOTOPES
MANAGEMENT
MATERIALS
METALS
MONOCARBOXYLIC ACIDS
NITRIC ACID
NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PH VALUE
PHOSPHONIC ACID ESTERS
POLYMERS
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE PROCESSING
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
RARE EARTHS
RESINS
SAMARIUM 157
SAMARIUM 158
SAMARIUM ISOTOPES
SECONDS LIVING RADIOISOTOPES
SEPARATION PROCESSES
SPECTROSCOPY
WASTE MANAGEMENT
WASTE PROCESSING