Technetium-99 in the atmosphere

Journal Article · Sun Jan 01 04:00:00 EST 1978 · Environ. Sci. Technol.; (United States)

DOI:https://doi.org/10.1021/es60137a006· OSTI ID:5116503

Ehrhardt, K C; Attrep, M Jr

The technetium 99 and strontium 90 concentrations were measured from a composite rain sample (1015 L) collected in the spring of 1975. The concentrations were (4.5 +- 1.5) x 10/sup -3/ and 0.11 +- 0.02 dpm/L, respectively. The results indicated that /sup 99/Tc concentration decreased from those samples measured in 1961, 1962, and 1967, whereas the /sup 99/Tc//sup 90/Sr ratio showed a steady increase during this time period. All observed /sup 99/Tc//sup 90/Sr values were larger than the anticipated values from the neutron-induced fission of /sup 235/U or /sup 239/Pu, indicating sources of /sup 99/Tc other than fission.

• Research Organization: East Texas State Univ., Commerce
• OSTI ID: 5116503
• Journal Information: Environ. Sci. Technol.; (United States), Journal Name: Environ. Sci. Technol.; (United States) Vol. 12:1; ISSN ESTHA
• Country of Publication: United States
• Language: English

Related Subjects

500300* -- Environment
Atmospheric-- Radioactive Materials Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALKALINE EARTH ISOTOPES
ALPHA DECAY RADIOISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHEMICAL ANALYSIS
COMPARATIVE EVALUATIONS
EARTH ATMOSPHERE
ECOLOGICAL CONCENTRATION
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HEAVY NUCLEI
HOURS LIVING RADIOISOTOPES
HYDROGEN COMPOUNDS
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPE RATIO
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEI
ODD-EVEN NUCLEI
OXYGEN COMPOUNDS
PLUTONIUM 239
PLUTONIUM ISOTOPES
RADIOACTIVITY
RADIOCHEMICAL ANALYSIS
RADIOECOLOGICAL CONCENTRATION
RADIOISOTOPES
RAIN WATER
STRONTIUM 90
STRONTIUM ISOTOPES
TECHNETIUM 99
TECHNETIUM ISOTOPES
URANIUM 235
URANIUM ISOTOPES
WATER
YEARS LIVING RADIOISOTOPES