Tritium Water Dating

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USGS Groundwater Dating Lab - Water Resources
Tritium / Introduction to Water Dating and Tracer Analysis . . .
Groundwater age-dating simplified - USGS
Tritium/ 3 He dating - Lamont-Doherty Earth Observatory
Tritium and Water Dating Laboratory / Laboratories . . .
Dating cave drip water by tritium - ScienceDirect
Tracing and Dating Young Ground Water - USGS
Dating cave drip water by tritium | Request PDF
PDF APPROACHES FOR GROUND-WATER DATING By L . Niel Plummer . . .
Tritium - Wikipedia
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3 H/ 3 He Dating Background . Tritium (3 H, half-life of 12 .43 years (Unterweger and others, 1980)) has provided an excellent tracer of young waters . Tritium input to ground water has occurred in a series of spikes following periods of atmospheric testing of nuclear devices that began in 1952 and reached a maximum in 1963-1964 .
Age- dating using tritium is based on the radioactive decay of tritium to helium-3 (3 He) after rainwater penetrates the ground during recharge . Because of the irregularly shaped bomb peak, tritium data can often give ambiguous ages .
The method—tritium-based age classification, or TBAC—requires just a single measurement of tritium , along with knowledge of sample date and location . Knowing groundwater age can help water -resource managers determine which contaminants are anticipated to be present or absent in groundwater, allowing more cost-effective use of monitoring dollars .
Tritium / 3 He dating . 1 . General background . Tritium (3 H or T) is the radioactive isotope of hydrogen that decays with a half life of 12 .43 years to its stable daughter 3 He . Tritium is produced naturally in the upper atmosphere by interaction of nitrogen, and, to a lesser extent, oxygen with cosmic rays . After oxidation to HTO, it takes part in the natural water cycle .
Tritium and Water Dating Laboratory . The Water Dating Lab at GNS has 55 years of experience in high-sensitivity tritium analysis . Our innovative, cutting edge techniques give by a large margin the highest accuracy and precision in tritium analysis [1] . This high tritium precision allows for new understanding of processes in groundwater, oceans, and . . .
Tritium drip- water dating The presented method is based on the radioactive hydrogen isotope tritium . It has a half-live of 12 .32 years ( Lucas and Unterweger, 2000 ) and is used in studies of groundwater and surface water to distinguish old (>50 years) from more recently infiltrated water ( Clark and Fritz, 1997 ) .
Tracing and Dating Young Ground Water . Data on concentrations of environmental tracers, such as chlorofluorocarbons (CFCs), tritium (3 H), and other chemical and isotopic substances in ground water , can be used to trace the flow of young water ( water recharged within the past 50 years) and to determine the time elapsed since recharge . Information about the age of ground water can be used to define recharge rates, refine hydrologic models of ground- water systems, predict contamination . . .
A method of deriving the travel time of drip water based on the tritium /helium 3 (3H/3He) dating method was demonstrated in limestone caves in Indonesia . The examined drip waters from two caves . . .
16 Tritium /Helium-3 Dating Tritium /helium-3 (3H/3He) dating is based on theradioactive decay of 3H (half-life 12 .4 years) .In closed systems, determination of both 3H and tritiogenic 3He (the daughter product of 3H decay) in ground water can define the initial 3H content and allow calculation of the 3H/3He age .Details of 3H/3He dating procedure are given in Schlosser and others (1988, 1989 . . .
Willard Libby recognized that tritium could be used for radiometric dating of water and wine . Decay . While tritium has several different experimentally determined values of its half-life, the National Institute of Standards and Technology lists 4,500 ± 8 days (12 .32 ± 0 .02 years) .
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