Precise half-life determination of 131Ba and 125Xe

Waniganeththi, S.; McCutchan, E. A.; Su, V. L.; Mattera, A.; Morse, C.; Wu, J.; Ota, S.; Aloi, J.; Finfrock, C.; Müller-Gatermann, C.; Philipsberg, P.; Sanders, V. A.; Sonzogni, A. A.

doi:10.1016/j.apradiso.2025.112280

Precise half-life determination of ¹³¹Ba and ¹²⁵Xe

Journal Article · Fri Oct 31 00:00:00 EDT 2025 · Applied Radiation and Isotopes

DOI:https://doi.org/10.1016/j.apradiso.2025.112280· OSTI ID:3010975

^[1]; McCutchan, E. A. ^[1]; Su, V. L. ^[1]; Mattera, A. ^[1]; Morse, C. ^[1]; Wu, J. ^[1]; Ota, S. ^[1]; Aloi, J. ^[1]; Finfrock, C. ^[1]; Müller-Gatermann, C. ^[2]; Philipsberg, P. ^[1]; Sanders, V. A. ^[1]; Sonzogni, A. A. ^[1]

Brookhaven National Laboratory (BNL), Upton, NY (United States)
Argonne National Laboratory (ANL), Argonne, IL (United States)

Barium-131 and Xenon-125 are valuable radioisotopes with numerous scientific and medical applications. Here, we produced both isotopes via proton irradiation of a cesium iodide (CsI) target at the Brookhaven Tandem Van de Graaff accelerator (BTVG). Following irradiation, we conducted systematic γ-ray spectroscopy measurements at the National Nuclear Data Center (NNDC) decay station using a calibrated High-Purity Germanium (HPGe) detector, collecting data over a 2-month period (spanning approximately 4.5 half-lives for ¹³¹Ba). Through careful analysis of the characteristic γ-ray emissions from both isotopes, we determined the half-life of ¹³¹Ba to be 11.55(6) days, which agrees with the previously evaluated value. For ¹²⁵Xe, we measured a half-life of 16.56(8) hours, slightly lower than the evaluated value.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-06CH11357; AC02-98CH10886; SC0012704

OSTI ID:: 3010975

Report Number(s):: BNL--229224-2025-JAAM

Journal Information:: Applied Radiation and Isotopes, Journal Name: Applied Radiation and Isotopes Vol. 228; ISSN 0969-8043

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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