Iodine-129 in thyroids and tellurium isotopes in meteorites by neutron activation analysis

Technical Report · Thu Jun 01 04:00:00 EDT 1978

OSTI ID:6528100

Ballad, R V

A combination of neutron activation and mass spectrometry has been used to determine the concentration of fissiogenic /sup 129/I and the value of the /sup 129/I//sup 127/I ratio in thyroids of man, cow, and deer from Missouri. Deer thyroids show an average value of /sup 129/I//sup 127/I = 1.8 x 10/sup -8/ and an average concentration of 3 x 10/sup -3/ pCi /sup 129/I per gram of thyroid (wet weight). Thyroids of cows and humans show successively lower values for the /sup 129/I//sup 127/I ratio and the /sup 129/I content because their diets dilute fission-produced /sup 129/I in the natural iodine cycle with mineral iodine. The results of analyses on a few thyroids from other geographic areas are also reported. The isotopic compositions of tellurium, krypton, and xenon were determined in acid-resistant residues of the Allende meteorite. Neutron activation and ..gamma..-counting were used to determine the relative abundances of six tellurium isotopes, and mass spectrometry was used to determine the isotopic compositions of krypton and xenon in aliquots of the same residues. Nucleogenetic anomalies were observed in the isotopic compositions of these three elements. The presence of isotopically distinct components of tellurium, krypton, and xenon in these residues provides strong support for the suggestion that our solar system formed directly from the debris of a supernova.

• Research Organization: Missouri Univ., Rolla (USA). Dept. of Chemistry
• OSTI ID: 6528100
• Report Number(s): COO-2450-1
• Country of Publication: United States
• Language: English

Related Subjects

560171 -- Radiation Effects-- Nuclide Kinetics & Toxicology-- Man-- (-1987)
560172* -- Radiation Effects-- Nuclide Kinetics & Toxicology-- Animals-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
640101 -- Astrophysics & Cosmology-- Cosmic Radiation
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACTIVATION ANALYSIS
ANIMALS
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BODY
CATTLE
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
COMPARATIVE EVALUATIONS
COWS
DATA
DATA FORMS
DEER
DOMESTIC ANIMALS
ENDOCRINE GLANDS
EXPERIMENTAL DATA
GLANDS
HADRON REACTIONS
INFORMATION
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IODINE 127
IODINE 129
IODINE ISOTOPES
IRON METEORITES
ISOLATED VALUES
ISOTOPE RATIO
ISOTOPES
KRYPTON ISOTOPES
MAMMALS
MAN
MASS SPECTROSCOPY
METEORITES
MIDWEST REGION
MISSOURI
MONITORING
NEUTRON REACTIONS
NORTH AMERICA
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL DATA
ODD-EVEN NUCLEI
ORGANS
PRIMATES
QUANTITY RATIO
RADIATION MONITORING
RADIOACTIVITY
RADIOISOTOPES
RUMINANTS
SPECTROSCOPY
STABLE ISOTOPES
TELLURIUM ISOTOPES
THYROID
USA
VERTEBRATES
XENON ISOTOPES
YEARS LIVING RADIOISOTOPES