UPDATE OF NIST HALF-LIFE RESULTS CORRECTED FOR IONIZATION CHAMBER SOURCE-HOLDER INSTABILITY

Published

November 4, 2013

Author(s)

Michael P. Unterweger

Abstract

As reported at ICRM 2011, it was discovered that the source holder used for calibrations in the NIST 4π ionization chamber (IC) was not stable. This has affected a large number of half-life measurement results previously reported and used in compilations of nuclear data. Corrections have been made on all of the half-life data based on the assumption that the changes to the detector response were gradual. The corrections are energy dependent and therefore radionuclide specific. This presentation will review our results and present the recommended changes in half-life values and/or uncertainties.

Citation

International Journal of Applied Radiation and Isotopes

Volume

64

Pub Type

Journals

Download Paper

https://doi.org/10.1016/j.apradiso.2013.11.017

Keywords

half-life measurement, ionization chamber, calibrations

Citation

Unterweger, M. (2013), UPDATE OF NIST HALF-LIFE RESULTS CORRECTED FOR IONIZATION CHAMBER SOURCE-HOLDER INSTABILITY, International Journal of Applied Radiation and Isotopes, [online], https://doi.org/10.1016/j.apradiso.2013.11.017 (Accessed October 20, 2025)