Isolation of tungsten and tantalum isotopes without supports from. cap alpha. -particle-irradiated hafnium targets

Journal Article · Fri Nov 01 04:00:00 EST 1985 · Sov. Radiochem. (Engl. Transl.); (United States)

OSTI ID:6127571

Gasita, S M; Iota, B Z; Malachkov, A G; Silant'ev, A I

An extraction procedure has been developed for successive isolation of tungsten (/sup 178/W and /sup 181/W) and tantalum (/sup 179/Ta and /sup 182/Ta) isotopes without supports from ..cap alpha..particle-irradiated hafnium targets. The target, irradiated on a cyclotron, is dissolved in hydrofluoric acid. Tantalum isotopes are extracted with tributyl phosphate (TBP) from 1-5 M HF and are then reextracted with a 1:1 ammonia solution, and hydrofluoric acid is removed by heating. Tungsten isotopes are extracted with a chloroform solution or N-benzoyl-N-phenylhydroxylamine (BPHA) from 11-12 M H/sub 2/SO/sub 4/ or ..cap alpha..-benzoin oxime from 4.5-5.5 M H/sub 2/SO/sub 4/ and are then reextracted with a l:l ammonia solution. The yield of tungsten isotopes is not less than 95%, and the content of radioactive impurities of other isotopes is not more than 0.1%.

• OSTI ID: 6127571
• Journal Information: Sov. Radiochem. (Engl. Transl.); (United States), Journal Name: Sov. Radiochem. (Engl. Transl.); (United States) Vol. 27:2; ISSN SVRDA
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPE AND RADIATION SOURCES
070100* -- Physical Isotope Separation
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400703 -- Radiochemistry & Nuclear Chemistry-- Radioisotope Production
ALPHA PARTICLES
ALPHA REACTIONS
AMINES
AMMONIA
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BUTYL PHOSPHATES
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CHLORINATED ALIPHATIC HYDROCARBONS
CHLOROFORM
DAYS LIVING RADIOISOTOPES
DISSOLUTION
ELECTRON CAPTURE RADIOISOTOPES
ESTERS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXTRACTION
HAFNIUM 178 TARGET
HALOGENATED ALIPHATIC HYDROCARBONS
HEATING
HEAVY NUCLEI
HYDRIDES
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
INTERMEDIATE MASS NUCLEI
IRRADIATION
ISOMERIC TRANSITION ISOTOPES
ISOTOPE RATIO
ISOTOPE SEPARATION
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUCLEAR REACTION YIELD
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID ESTERS
RADIOISOTOPE GENERATORS
RADIOISOTOPES
SEPARATION PROCESSES
SOLVENT EXTRACTION
TANTALUM 179
TANTALUM 182
TANTALUM ISOTOPES
TARGETS
TBP
TUNGSTEN 178
TUNGSTEN 181
TUNGSTEN ISOTOPES
YEARS LIVING RADIOISOTOPES
YIELDS