NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Primary Radioactive Gas Standards (Excluding Radon)
Published
Author(s)
Michael P. Unterweger
Abstract
This paper presents an overview of the primary calibration of radioactive gas standards using length-compensated internal gas counters. The principal of length compensation and the effects of high voltage, detector material, and gas pressure are discussed. Some examples of primary calibrations are given.
Citation
Metrologia
Pub Type
Journals
Keywords
gas standards, intercomparisons, internal gas counting, length-compensation, radioactive gases, radiometrology
Citation
Unterweger, M.
(2008),
Primary Radioactive Gas Standards (Excluding Radon), Metrologia
(Accessed October 6, 2025)