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Title: Simultaneous measurement of tritium and radiocarbon by ultra-low-background proportional counting

Abstract

Use of ultra-low-background capabilities at Pacific Northwest National Laboratory provide enhanced sensitivity for measurement of low-activity sources of tritium and radiocarbon using proportional counters. Tritium levels are nearly back to pre-nuclear test backgrounds (~2-8 TU in rainwater), which can complicate their dual measurement with radiocarbon due to overlap in the isotope’s respective energy spectra. This activity makes direct dual-isotope measurements challenging without additional chemistry to concentrate the tritium in a sample. We present results of single-isotope proportional counter measurements used to analyze a dual-isotope methane sample synthesized from ~120 mg of H2O and present sensitivity results.

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1371987
Report Number(s):
PNNL-SA-120393
Journal ID: ISSN 0969-8043
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Radiation and Isotopes; Journal Volume: 126; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
07 ISOTOPE AND RADIATION SOURCES

Citation Formats

Mace, Emily, Aalseth, Craig, Alexander, Tom, Back, Henning, Day, Anthony, Hoppe, Eric, Keillor, Martin, Moran, Jim, Overman, Cory, Panisko, Mark, and Seifert, Allen. Simultaneous measurement of tritium and radiocarbon by ultra-low-background proportional counting. United States: N. p., 2017. Web. doi:10.1016/j.apradiso.2016.12.033.
Mace, Emily, Aalseth, Craig, Alexander, Tom, Back, Henning, Day, Anthony, Hoppe, Eric, Keillor, Martin, Moran, Jim, Overman, Cory, Panisko, Mark, & Seifert, Allen. Simultaneous measurement of tritium and radiocarbon by ultra-low-background proportional counting. United States. doi:10.1016/j.apradiso.2016.12.033.
Mace, Emily, Aalseth, Craig, Alexander, Tom, Back, Henning, Day, Anthony, Hoppe, Eric, Keillor, Martin, Moran, Jim, Overman, Cory, Panisko, Mark, and Seifert, Allen. Tue . "Simultaneous measurement of tritium and radiocarbon by ultra-low-background proportional counting". United States. doi:10.1016/j.apradiso.2016.12.033.
@article{osti_1371987,
title = {Simultaneous measurement of tritium and radiocarbon by ultra-low-background proportional counting},
author = {Mace, Emily and Aalseth, Craig and Alexander, Tom and Back, Henning and Day, Anthony and Hoppe, Eric and Keillor, Martin and Moran, Jim and Overman, Cory and Panisko, Mark and Seifert, Allen},
abstractNote = {Use of ultra-low-background capabilities at Pacific Northwest National Laboratory provide enhanced sensitivity for measurement of low-activity sources of tritium and radiocarbon using proportional counters. Tritium levels are nearly back to pre-nuclear test backgrounds (~2-8 TU in rainwater), which can complicate their dual measurement with radiocarbon due to overlap in the isotope’s respective energy spectra. This activity makes direct dual-isotope measurements challenging without additional chemistry to concentrate the tritium in a sample. We present results of single-isotope proportional counter measurements used to analyze a dual-isotope methane sample synthesized from ~120 mg of H2O and present sensitivity results.},
doi = {10.1016/j.apradiso.2016.12.033},
journal = {Applied Radiation and Isotopes},
number = C,
volume = 126,
place = {United States},
year = {Tue Aug 01 00:00:00 EDT 2017},
month = {Tue Aug 01 00:00:00 EDT 2017}
}