Atmospheric 81Kr as an Integrator of Cosmic-Ray Flux on the Hundred-Thousand-Year Time Scale
Abstract
The atmospheric abundance of 81 Kr is a global integrator of cosmic rays. It is insensitive to climate shifts, geographical variations, and short-term solar cycle activity, making it an ideal standard to test models of cosmic-ray flux on the timescale of 105 years. Here we present the first calculation of absolute 81 Kr production rates in the atmosphere, and a measurement of the atmospheric 81 Kr/Kr abundance via the Atom Trap Trace Analysis (ATTA) method. The measurement result significantly deviates from the previously reported values. The agreement between the measurement and model prediction supports the current understanding of the production mechanisms. Additionally, the calculated 81 Kr atmospheric inventory over the past 1.5 Ma provides a more accurate input function for radiokrypton dating.
- Authors:
-
[1];
[2];
[3];
[4];
[4];
[1];
[7]
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Univ. of Bern (Switzerland)
- Univ. of Bern (Switzerland); Commonwealth Scientific and Industrial Research Organization (CSIRO), Glen Osmond, SA (Australia)
- Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Science and Technology of China, Hefei (China)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Comenius Univ., Bratislava (Slovakia)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division; USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1630808
- Alternate Identifier(s):
- OSTI ID: 1598690; OSTI ID: 1630926
- Report Number(s):
- LLNL-JRNL-810701
Journal ID: ISSN 0094-8276; 1017387
- Grant/Contract Number:
- AC52-07NA27344; AC02-06CH11357; AC02-05CH11231; AC52‐07NA27344; AC02‐05CH11231; AC02‐06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Geophysical Research Letters
- Additional Journal Information:
- Journal Volume: 47; Journal Issue: 3; Journal ID: ISSN 0094-8276
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; krypton-81; cosmic rays; radiokrypton dating; atom trap trace analysis
Citation Formats
Zappala, Jake C., Baggenstos, D., Gerber, C., Jiang, W., Kennedy, B. M., Lu, Zheng-Tian, Masarik, J., Mueller, P., Purtschert, R., and Visser, A. Atmospheric 81Kr as an Integrator of Cosmic-Ray Flux on the Hundred-Thousand-Year Time Scale. United States: N. p., 2020.
Web. doi:10.1029/2019GL086381.
Zappala, Jake C., Baggenstos, D., Gerber, C., Jiang, W., Kennedy, B. M., Lu, Zheng-Tian, Masarik, J., Mueller, P., Purtschert, R., & Visser, A. Atmospheric 81Kr as an Integrator of Cosmic-Ray Flux on the Hundred-Thousand-Year Time Scale. United States. https://doi.org/10.1029/2019GL086381
Zappala, Jake C., Baggenstos, D., Gerber, C., Jiang, W., Kennedy, B. M., Lu, Zheng-Tian, Masarik, J., Mueller, P., Purtschert, R., and Visser, A. Tue .
"Atmospheric 81Kr as an Integrator of Cosmic-Ray Flux on the Hundred-Thousand-Year Time Scale". United States. https://doi.org/10.1029/2019GL086381. https://www.osti.gov/servlets/purl/1630808.
@article{osti_1630808,
title = {Atmospheric 81Kr as an Integrator of Cosmic-Ray Flux on the Hundred-Thousand-Year Time Scale},
author = {Zappala, Jake C. and Baggenstos, D. and Gerber, C. and Jiang, W. and Kennedy, B. M. and Lu, Zheng-Tian and Masarik, J. and Mueller, P. and Purtschert, R. and Visser, A.},
abstractNote = {The atmospheric abundance of 81 Kr is a global integrator of cosmic rays. It is insensitive to climate shifts, geographical variations, and short-term solar cycle activity, making it an ideal standard to test models of cosmic-ray flux on the timescale of 105 years. Here we present the first calculation of absolute 81 Kr production rates in the atmosphere, and a measurement of the atmospheric 81 Kr/Kr abundance via the Atom Trap Trace Analysis (ATTA) method. The measurement result significantly deviates from the previously reported values. The agreement between the measurement and model prediction supports the current understanding of the production mechanisms. Additionally, the calculated 81 Kr atmospheric inventory over the past 1.5 Ma provides a more accurate input function for radiokrypton dating.},
doi = {10.1029/2019GL086381},
journal = {Geophysical Research Letters},
number = 3,
volume = 47,
place = {United States},
year = {Tue Jan 21 00:00:00 EST 2020},
month = {Tue Jan 21 00:00:00 EST 2020}
}
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