Setting a limit on anthropogenic sources of atmospheric 81Kr through Atom Trap Trace Analysis
- Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division; Univ. of Chicago, IL (United States). Department of Physics and Enrico Fermi Institute
- Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
- University of Science and Technology of China, Hefei (China). School of Nuclear Science and Engineerin
- University of Bern (Switzerland). Climate and Environmental Physics Division, Physics Institute
In this study, we place a 2.5% limit on the anthropogenic contribution to the modern abundance of 81Kr/Kr in the atmosphere at the 90% confidence level. Due to its simple production and transport in the terrestrial environment, 81Kr (half-life = 230,000 years) is an ideal tracer for old water and ice with mean residence times in the range of 105–106 years. In recent years, 81Kr-dating has been made available to the earth science community thanks to the development of Atom Trap Trace Analysis (ATTA), a laser-based atom counting technique. Further upgrades and improvements to the ATTA technique now allow us to demonstrate 81Kr/Kr measurements with relative uncertainties of 1% and place this new limit on anthropogenic 81Kr. As a result of this limit, we have removed a potential systematic constraint for 81Kr-dating.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- AC02-06CH11357; DEAC02-06CH11357
- OSTI ID:
- 1356576
- Alternate ID(s):
- OSTI ID: 1413359
- Journal Information:
- Chemical Geology, Vol. 453, Issue C; ISSN 0009-2541
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Reactions along the astrophysical s-process path and prospects for neutron radiotherapy with the Liquid-Lithium Target (LiLiT) at the Soreq Applied Research Accelerator Facility (SARAF)
|
journal | March 2019 |
Similar Records
Using 81Kr and noble gases to characterize and date groundwater and brines in the Baltic Artesian Basin on the one-million-year timescale
A new method of measuring {sup 81}Kr and {sup 85}Kr abundances in environmental samples.