Development of a low-level Ar-37 calibration standard
R. M. Williams, C. E. Aalseth, T. W. Bowyer, A. R. Day, E. S. Fuller,, D. A. Haas, J. C. Hayes, E. W. Hoppe, P. H. Humble, M. E. Keillor, B. D., LaFerriere, E. K. Mace, J. I. McIntyre, H. S. Miley, A. W. Myers, J. L., Orrell, C. T. Overman, M. E. Panisko, A. Seifert
TL;DR
This paper discusses the development of a low-level Ar-37 calibration standard crucial for sensitive detection of underground nuclear explosions, including process development, measurement analysis, and uncertainty estimation.
Contribution
It introduces a new process for generating and quantifying low-level Ar-37 standards for calibration purposes.
Findings
Progress in generating low-level Ar-37 standards
Analysis of measurement uncertainties
Calibration standards at soil background levels
Abstract
Argon-37 is an environmental signature of an underground nuclear explosion. Producing and quantifying low-level Ar-37 standards is an important step in the development of sensitive field measurement instruments. This paper describes progress at Pacific Northwest National Laboratory in developing a process to generate and quantify low-level Ar-37 standards, which can be used to calibrate sensitive field systems at activities consistent with soil background levels. This paper presents a discussion of the measurement analysis, along with assumptions and uncertainty estimates.
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