title: Development of a low-level (37)Ar calibration standard.
abstract: Argon-37 is an environmental signature of an underground nuclear explosion. Producing and quantifying low-level (37)Ar 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 (37)Ar 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.
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA. Electronic address: Richard.Williams@pnnl.gov.
authors.forename: R M
authors.initials: RM
authors.lastname: Williams
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: C E
authors.initials: CE
authors.lastname: Aalseth
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: T W
authors.initials: TW
authors.lastname: Bowyer
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: A R
authors.initials: AR
authors.lastname: Day
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: E S
authors.initials: ES
authors.lastname: Fuller
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: D A
authors.initials: DA
authors.lastname: Haas
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: J C
authors.initials: JC
authors.lastname: Hayes
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: E W
authors.initials: EW
authors.lastname: Hoppe
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: P H
authors.initials: PH
authors.lastname: Humble
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: M E
authors.initials: ME
authors.lastname: Keillor
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: B D
authors.initials: BD
authors.lastname: LaFerriere
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: E K
authors.initials: EK
authors.lastname: Mace
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: J I
authors.initials: JI
authors.lastname: McIntyre
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: H S
authors.initials: HS
authors.lastname: Miley
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: A W
authors.initials: AW
authors.lastname: Myers
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: J L
authors.initials: JL
authors.lastname: Orrell
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: C T
authors.initials: CT
authors.lastname: Overman
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: M E
authors.initials: ME
authors.lastname: Panisko
authors.affiliation: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA.
authors.forename: A
authors.initials: A
authors.lastname: Seifert
keywords: Absolute radiation measurement; Electroformed copper; Length compensated proportional counting; Ultra low-background; Uncertainty analysis