Measurement of the /sup 129/I//sup 131/I ratio in Chernobyl fallout
Rainwater collected in the Munich area approximately one week after the Chernobyl reactor accident was investigated for its content of the radioisotopes /sup 129/I (T/sub 1/2/ = 1.6 x 10/sup 7/ y) and /sup 131/I (T/sub 1/2/ = 8.04 d). For the time of release, an isotopic ratio of /sup 129/I//sup 131/I = 19 +- 5 was found. This value was obtained from a gamma-ray activity measurement of /sup 131/I with a GE detector and a concentration measurement of /sup 129/I with accelerator mass spectrometry. From the measured ratio an operating time of the reactor prior to the accident in the vicinity of two years can be estimated, which is in fair agreement with estimates from other long-lived to short-lived radioisotope ratios in the Chernobyl fallout. Some measurements of /sup 131/I activity in thyroids of persons living in the Munich area is also reported.
- Research Organization:
- Technische Univ. Muenchen, Garching (Germany, F.R.). Physikdepartment; Hebrew Univ., Jerusalem (Israel). Racah Inst. of Physics; Weizmann Inst. of Science, Rehovoth (Israel). Dept. of Nuclear Physics; Weizmann Inst. of Science, Rehovoth (Israel). Dept. of Isotopes
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6705977
- Report Number(s):
- CONF-860735-1; ON: DE87004990
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Atmospheric-- Radioactive Materials Monitoring & Transport-- (-1989)
510300 -- Environment
Terrestrial-- Radioactive Materials Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACCIDENTS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BODY
CHERNOBYLSK-4 REACTOR
DAYS LIVING RADIOISOTOPES
ENDOCRINE GLANDS
ENRICHED URANIUM REACTORS
EUROPE
FALLOUT
FEDERAL REPUBLIC OF GERMANY
GLANDS
GRAPHITE MODERATED REACTORS
HUMAN POPULATIONS
HYDROGEN COMPOUNDS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IODINE 129
IODINE 131
IODINE ISOTOPES
ISOTOPE RATIO
ISOTOPES
LWGR TYPE REACTORS
NUCLEI
ODD-EVEN NUCLEI
ORGANS
OXYGEN COMPOUNDS
POPULATIONS
POWER REACTORS
RADIOISOTOPES
RAIN WATER
REACTOR ACCIDENTS
REACTORS
THERMAL REACTORS
THYROID
WATER
WATER COOLED REACTORS
WESTERN EUROPE
YEARS LIVING RADIOISOTOPES