Skip to main content

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.

U.S. flag

An official website of the United States government

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.

On the 209Po Half-Life Error and Its Confirmation: A Critique

Published

Author(s)

Ronald Colle, Arthur M. Colle

Abstract

Collé, et al [(2007) Appl. Radiat Isot. 65, 728; (2014) J. Phys. G: Nucl. Part. Phys. 41, 105103], over the course of nearly a decade and with decay data from a period of 20.7 years, initially uncovered and then substantiated a 25 % error in the 209Po half-life. Pommé, et al [(2015) Appl. Radiat Isot. 97, 84] recently reported on a “confirmation” of the error, which was said to be based on another half-life determination. This paper addresses the issue as to whether the Pommé (2015) claim from measurements made over 0.8 % of one half-life can withstand critical scrutiny. Although the Collé (2014) and Pommé (2015) values of (125.3  3.3) a and (120  6) a, respectively, are ostensibly in agreement, that appearance is irrelevant to the larger issue as to what constitutes a valid half-life determination. This critique is intended to highlight, as an example, that a careful and realistic analysis beyond the mere fitting of decay data to an exponential function is required for the measurement and reporting of half-life values.
Citation
Journal of Radioanalytical and Nuclear Chemistry-Articles

Keywords

data analysis, half-life, measurement uncertainty, polonium-209

Citation

Colle, R. and Colle, A. (2015), On the 209Po Half-Life Error and Its Confirmation: A Critique, Journal of Radioanalytical and Nuclear Chemistry-Articles, [online], https://doi.org/10.1007/s10967-015-4307-y (Accessed October 6, 2025)

Issues

If you have any questions about this publication or are having problems accessing it, please contact [email protected].

Created June 11, 2015, Updated November 10, 2018
Was this page helpful?