Physics
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987e%26psl..85...74t&link_type=abstract
Earth and Planetary Science Letters, Volume 85, Issue 1-3, p. 74-78.
Physics
9
Scientific paper
3He/4He ratios up to 3.5 times the ratio of atmospheric He were found in groundwater samples. The 3He enrichment can be attributed to radiogenic 3He produced by in-situ beta-decay of 3H. This shows that tritiogenic 3He is accumulating in confined waters. From tritiogenic 3He and 3H concentrations, ages of groundwaters can be calculated. Detection of tritiogenic 3He gives a tool to trace a tritium contamination which occurred in the past and cannot be assessed only by the 3H counting method.
Mizutani Yoshihiko
Takaoka Nobuo
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