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.

Search Publications by: Adam J. Pearce (Fed)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 1 - 3 of 3

Standardization of 243Am

May 2, 2026
Author(s)
Madeleine Bodine, Lizbeth Laureano-Perez, Ronald Colle, Justin Wilde, Ryan Fitzgerald, Leticia Pibida, Jerome LaRosa, Adam Pearce, Richard Essex, Denis Bergeron
Americium's longest-lived isotope, americium-243, has a half-life of 7367(23) years. It decays into neptunium-239 through alpha decay. Americium has a few practical uses: as a monitor for radioactive contamination and as a tracer for radiochemical

Standardization of 239Pu using isotopic ratios obtained through alpha spectrometry and mass spectrometry

January 10, 2026
Author(s)
Adam Pearce, Madeleine Bodine, Ronald Colle, Richard Essex, Lizbeth Laureano-Perez, Jerome LaRosa, Leticia Pibida, Mark Tyra
The standardization of a new 239Pu radioactivity solution with considerable impurity was investigated. The massic activity of 239Pu was obtained through 4πα liquid scintillation (LS) counting with correction for significant amounts of other plutonium

Activity measurements and calibrations for 225Ac in radioactive equilibrium with its progeny

December 9, 2024
Author(s)
Denis Bergeron, Gulakhshan Hamad, Brittany Broder, Jeffrey Cessna, Adam Pearce, Jerome LaRosa, Leticia Pibida, Brian E. Zimmerman
The massic activity of 225Ac in 0.1 mol/L HCl was measured by multiple primary methods over four consistent measurement campaigns. Results from the triple-to-double coincidence ratio (TDCR) method of liquid scintillation (LS) counting were in accord with
Was this page helpful?