Evidence for revision of the evaluated half-life of 207Bi. (April 2018)

• Record Type: Journal Article
• Authors: Pibida, L.; King, L.
• Is Part Of: Applied radiation and isotopes. Volume 134(2018:Apr.)
• Page Start: 391
• Page End: 394
• Publication Date: 2018-04
• Subjects: Half-life -- 207Bi -- Gamma-ray spectrometry -- Nuclear data; Radiology -- Periodicals; Radiation -- Industrial applications -- Periodicals; Nuclear chemistry -- Periodicals; Internet resource; Periodical; 660.298
• DOI: 10.1016/j.apradiso.2017.06.008
• Languages: English
• ISSNs: 0969-8043

Abstract

Abstract: The National Institute of Standards and Technology (NIST) compared the measured full-energy peak efficiency obtained from a large set of sources to that of a 207 Bi source obtained using three different half-life values. The values of the half-life used for this comparison are published in the Decay Data Evaluation Project (32.9 ± 1.4) years and the Evaluated Nuclear Structure Data File (31.55 ± 0.04) years, and in a recent NIST publication (31.20 ± 0.05) years (or (11395 ± 18) days). Highlights: Differences in 207 Bi half-life values. High purity germanium (HPGe) detectors for gamma-ray spectrometry measurements. Comparison of HPGe efficiency measurements using 207 Bi half-life published values.