{sup 208}Tl and {sup 24}Na Gamma Sources for Tracing soil Water Movement with Deuterium

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The heavy water soil water tracer technique is based on the reaction of high-energy gamma photons with deuterium to indicate the tracer's location. The high-energy gamma sources {sup 208}Tl and {sup 24}Na were compared in their effectiveness to produce neutrons from heavy water. In tests with vials of heavy water at various locations in 208-liter (55-gallon) drums of dry and moist soil, {sup 24}Na gave 23 percent higher neutron count rates than {sup 208}Tl, but this was more than offset by its shorter effective half-life (15 hours vs. 1.9 years).

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Hawkins, R.H. August 29, 2001.

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Description

The heavy water soil water tracer technique is based on the reaction of high-energy gamma photons with deuterium to indicate the tracer's location. The high-energy gamma sources {sup 208}Tl and {sup 24}Na were compared in their effectiveness to produce neutrons from heavy water. In tests with vials of heavy water at various locations in 208-liter (55-gallon) drums of dry and moist soil, {sup 24}Na gave 23 percent higher neutron count rates than {sup 208}Tl, but this was more than offset by its shorter effective half-life (15 hours vs. 1.9 years).

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  • Soil Science Society of America, New Orleans, LA (US), 11/10/1968--11/15/1968

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  • Report No.: DP-MS-68-43
  • Office of Scientific & Technical Information Report Number: 786060
  • Archival Resource Key: ark:/67531/metadc724047

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  • August 29, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • May 5, 2016, 5:53 p.m.

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Hawkins, R.H. {sup 208}Tl and {sup 24}Na Gamma Sources for Tracing soil Water Movement with Deuterium, article, August 29, 2001; South Carolina. (digital.library.unt.edu/ark:/67531/metadc724047/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.