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AbstractAbstract
[en] A liquid scintillator αlpha spectrometer was built for the determination of Th-228, Th-230 and Th-232 in liquid effluents from Uranium mines and mills. The resolution of the αlpha spectrometer was found to be 200-300 KeV, when the scintillator was 8% T0P0, 0,77% scintimix-4 (91% PP0 and 9% Dimetil-P0P0P) and 10% of naphthalene in toluene. Aliquat-336 in xylene (30% v/v) was used to separate the thorium isotopes from other interfering radionuclides (U-238, U-234, Ra-226, Po-210). Under the extraction experimental conditions, the detection limits were 1,2 pCi/1 for Th-232, 1,2 pCi/1 for Th-230 and 0,9 pCi/1 for Th-228, for 1000 minutes of counting time. (author)
Original Title
Determinacao de 232Th, 230Th e 228Th em efluentes liquidos provenientes da mineracao de uranio
Primary Subject
Source
Oct 1979; 107 p; Diss. (M.Sc.)
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation; Numerical Data
Report Number
Country of publication
ACTINIDE NUCLEI, ALKYLATED AROMATICS, ALPHA DECAY RADIOISOTOPES, AROMATICS, DATA, EVEN-EVEN NUCLEI, HEAVY ION DECAY RADIOISOTOPES, HEAVY NUCLEI, HYDROCARBONS, HYDROGEN COMPOUNDS, INFORMATION, INORGANIC ACIDS, INORGANIC COMPOUNDS, ISOTOPES, MATERIALS, MINES, NEON 24 DECAY RADIOISOTOPES, NITROGEN COMPOUNDS, NUCLEI, NUMERICAL DATA, ORGANIC COMPOUNDS, OXYGEN COMPOUNDS, RADIOACTIVE MATERIALS, RADIOACTIVE WASTES, RADIOISOTOPES, SPECTROSCOPY, SPONTANEOUS FISSION RADIOISOTOPES, THORIUM ISOTOPES, UNDERGROUND FACILITIES, WASTES, YEARS LIVING RADIOISOTOPES
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