Half-Life Measurements of 110Sn, 113Sn, 117mSn, and 123mSn Produced via Photon Activation of Natural Tin
Abstract
We report independent determinations of the ground-state half-lives of 110Sn, 113Sn, and the isomeric states 117mSn (Jπ = 11/2−) and 123mSn (Jπ = 3/2+), produced via photon activation of natural tin using a TT-300HE Rhodotron accelerator. The activated samples were monitored over several months using a high-purity germanium (HPGe) detector. Time-dependent γ-ray spectra were analyzed using Gaussian peak fitting for the \SI{280.49}{keV}, \SI{391.697}{keV}, \SI{158.56}{keV}, and \SI{160.34}{keV} transitions, yielding half-lives of \SI{4.165(25)}{h} for 110Sn, \SI{116.08(94)}{d} for 113Sn, \SI{13.95(1)}{d} for 117mSn, and \SI{39.95(12)}{min} for 123mSn. Agreement with Nuclear Data Sheets (NDS) recommended values is generally observed for 110Sn, 113Sn, and 123mSn, with deviations consistent within combined uncertainties when quantified using standardized differences (z-scores). In contrast, 117mSn exhibits a statistically significant deviation from the evaluated value of \SI{13.76(4)}{d}, with a z-score indicating a discrepancy well beyond expected statistical fluctuations. This result suggests a systematic difference warranting further investigation, with potential implications for applications relying on precise decay data, including calibration, dosimetry, and astrophysical modeling.
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BibTeX
@misc{nusair2026halflife,
title = {{Half-Life Measurements of $^110$Sn, $^113$Sn, $^117\mathrmm$Sn, and $^123\mathrmm$Sn Produced via Photon Activation of Natural Tin}},
author = {O Nusair and D Devries and M Toto-Gonzalez},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2606.27064},
eprint = {2606.27064},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2606.27064},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Half-Life Measurements of ^110Sn, ^113Sn, ^117mSn, and ^123mSn Produced via Photon Activation of Natural Tin
AU - O Nusair
AU - D Devries
AU - M Toto-Gonzalez
PY - 2026
DA - 2026/10/13
PB - arXiv
DO - 10.48550/arxiv.2606.27064
UR - https://arxiv.org/abs/2606.27064
AB - We report independent determinations of the ground-state half-lives of ^110Sn, ^113Sn, and the isomeric states ^117mSn (J^π = 11/2^−) and ^123mSn (J^π = 3/2^+), produced via photon activation of natural tin using a TT-300HE Rhodotron accelerator. The activated samples were monitored over several months using a high-purity germanium (HPGe) detector. Time-dependent γ-ray spectra were analyzed using Gaussian peak fitting for the \SI{280.49}{keV}, \SI{391.697}{keV}, \SI{158.56}{keV}, and \SI{160.34}{keV} transitions, yielding half-lives of \SI{4.165(25)}{h} for ^110Sn, \SI{116.08(94)}{d} for ^113Sn, \SI{13.95(1)}{d} for ^117mSn, and \SI{39.95(12)}{min} for ^123mSn. Agreement with Nuclear Data Sheets (NDS) recommended values is generally observed for ^110Sn, ^113Sn, and ^123mSn, with deviations consistent within combined uncertainties when quantified using standardized differences (z-scores). In contrast, ^117mSn exhibits a statistically significant deviation from the evaluated value of \SI{13.76(4)}{d}, with a z-score indicating a discrepancy well beyond expected statistical fluctuations. This result suggests a systematic difference warranting further investigation, with potential implications for applications relying on precise decay data, including calibration, dosimetry, and astrophysical modeling.
ER -