NATURAL CONCENTRATION OF KRYPTON-85, CARBON-14, AND TRITIUM IN RECENT YEARS
Technical Report
·
OSTI ID:4811299
Kr (10 to 50 ml) was collected at Tokyo from liquid oxygen obtained from a small-scale nitrogen liquefier. A remarkable increase in the concentration of atmospheric Kr after the middle of 1960 is shown. Atmospheric CO/sub 2/ was collected at Tokyo by absorption in NaOH solution, and the radioactivity was measured. Tree rings were analyzed for C/sup 14/ and tritium concentrations. The concentration of C/sup 14/ and of tritium in the tree ring are regarded as an annual mean value of the C/sup 14/ concentration in the atmosphere and of the tritium concentration in rain water. The concentration of atmospheric C/sup 14/ had a maximum value at the beginning of 1960, and the concentration of tritium decreased after 1959 with a half life of about one year. The data are tabulated. (P.C.H.)
- Research Organization:
- Gakushuin Univ., Tokyo
- NSA Number:
- NSA-16-004389
- OSTI ID:
- 4811299
- Report Number(s):
- A/AC.82/G/L.693
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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