PREPARATION OF LONG-LIVED HAFNIUM-182

Journal Article · Sat Apr 01 04:00:00 EST 1961 · J. Inorg. & Nuclear Chem.

DOI:https://doi.org/10.1016/0022-1902(61)80214-5· OSTI ID:4032271

Naumann, R A; Michel, M C

Hf/sup 182/ was prepared by irradiating Hf for six months at a neutron flux of 3 x 10/sup 14/ n/cm/sup 2/ per sec. The samples consisted of normal HfO/ sub 2/, 10mg, and enriched HfO/sub 2/ (93-3% Hf/sup 180/), 16mg, in quartz ampoules. After irradiation, the samples were allowed to decay for 30 months. Then the ampoules were dissolved in HF and adjusted to 12N in H/sub 2/SO/sub 4/ and 0.4N in HF. Successive extractions of these solutions with methyl-isobutyl ketone were carried out until scintillation spectra of the organic fractions taken with a deep well crystal revealed no Ta/sup 182/ activity. Then the enriched sample showed the presence of the Hf/sup 182/ when investigated with the mass spectrometer. From the counting rate of Ta/sup 182/ daughter, the saturation specific activity of 360 plus or minus 180 dis/min per mg was computed. The half life of Hf/sup 182/ was calculated to be 8 plus or minus 5 x 10/sup 6/ years. (N.W.R.)

• Research Organization: Frick Chemical and Palmer Physical Labs., Princeton, N.J.
• NSA Number: NSA-15-017580
• OSTI ID: 4032271
• Journal Information: J. Inorg. & Nuclear Chem., Journal Name: J. Inorg. & Nuclear Chem. Vol. Vol: 17
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BUTYL RADICALS
CRYSTALS
DECAY
ENRICHMENT
HAFNIUM
HAFNIUM 180
HAFNIUM 182
HAFNIUM OXIDES
HALF-LIFE
HYDROFLUORIC ACID
IRRADIATION
ISOTOPES
KETONES
MASS SPECTROMETERS
MATHEMATICS
MEASURED VALUES
METHYL RADICALS
NEUTRON FLUX
NEUTRONS
NUMERICALS
PHYSICS
PREPARATION
QUARTZ
RADIOACTIVITY
RESEARCH REACTORS
SCINTILLATION COUNTERS
SOLUTIONS
SPECTRA
SPECTROMETERS
SULFURIC ACID
TANTALUM 182
VESSELS