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
- Resource Relation:
- Conference: Adriatico research conference on environmental physics: the physics of aerosols, Miramare, Trieste, Italy, 21 Jul 1986; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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CHERNOBYLSK-4 REACTOR
FALLOUT
IODINE 129
ISOTOPE RATIO
IODINE 131
FEDERAL REPUBLIC OF GERMANY
HUMAN POPULATIONS
RAIN WATER
REACTOR ACCIDENTS
THYROID
ACCIDENTS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BODY
DAYS LIVING RADIOISOTOPES
ENDOCRINE GLANDS
ENRICHED URANIUM REACTORS
EUROPE
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GRAPHITE MODERATED REACTORS
HYDROGEN COMPOUNDS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IODINE ISOTOPES
ISOTOPES
LWGR TYPE REACTORS
NUCLEI
ODD-EVEN NUCLEI
ORGANS
OXYGEN COMPOUNDS
POPULATIONS
POWER REACTORS
RADIOISOTOPES
REACTORS
THERMAL REACTORS
WATER
WATER COOLED REACTORS
WESTERN EUROPE
YEARS LIVING RADIOISOTOPES
500300* - Environment
Atmospheric- Radioactive Materials Monitoring & Transport- (-1989)
510300 - Environment
Terrestrial- Radioactive Materials Monitoring & Transport- (-1989)