Precise mass measurements of A = 133 isobars with the Canadian Penning Trap: Resolving the Q β − anomaly at 133Te

Valverde, A. A.; Kondev, F. G.; Liu, B.; Ray, D.; Brodeur, M.; Burdette, D. P.; Callahan, N.; Cannon, A.; Clark, J. A.; Hoff, D. E.M.; Orford, R.; Porter, W. S.; Savard, G.; Sharma, K. S.; Varriano, L.

doi:10.1016/j.physletb.2024.139037

Title: Precise mass measurements of A = 133 isobars with the Canadian Penning Trap: Resolving the Q β − anomaly at 133Te

Journal Article · 23 September 2024 · Physics Letters. B

DOI: https://doi.org/10.1016/j.physletb.2024.139037 · OSTI ID:2447650

^[1]; Kondev, F. G. ^[2]; Liu, B. ^[3]; Ray, D. ^[1]; Brodeur, M. ^[4]; Burdette, D. P. ^[2]; Callahan, N. ^[2]; Cannon, A. ^[3]; Clark, J. A. ^[1]; Hoff, D. E.M. ^[5]; Orford, R. ^[6]; Porter, W. S. ^[4]; Savard, G. ^[7]; Sharma, K. S. ^[8]; Varriano, L. ^[9]

Argonne National Laboratory (ANL), Argonne, IL (United States); Univ. of Manitoba, Winnipeg, MB (Canada)
Argonne National Laboratory (ANL), Argonne, IL (United States)
Argonne National Laboratory (ANL), Argonne, IL (United States); University of Notre Dame, IN (United States)
University of Notre Dame, IN (United States)
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Argonne National Laboratory (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)
Univ. of Manitoba, Winnipeg, MB (Canada)
Argonne National Laboratory (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States); Univ. of Washington, Seattle, WA (United States)

We report precision mass measurements of ¹³³Sb ^133g,mTe, and ^133g,mI, produced at CARIBU at Argonne National Laboratory's ATLAS facility and measured using the Canadian Penning Trap mass spectrometer. These masses clarify an anomaly in the ¹³³Te β-decay. The masses reported in the 2020 Atomic Mass Evaluation (M. Wang et al., 2021) produce Q_B^-(¹³³Te)=2920(6) keV; however, the highest-lying ¹³³I level populated in this decay is observed at E_i = 2935.83(15) keV, resulting in an anomalous Q$$^i_B-$$ = -16(6)keV. Our new measurements give Q_B^-(¹³³Te)=2934.8(11) keV, a factor of five more precise, yielding Q$$^i_B$$ = -1.0(12) keV, a 3σ shift from the previous results. This resolves this anomaly, but indicates further anomalies in our understanding of the structure of this isotope.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States). Argonne Tandem Linac Accelerator System (ATLAS); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-05CH11231; AC02-06CH11357

OSTI ID:: 2447650

Journal Information:: Physics Letters. B, Journal Name: Physics Letters. B Vol. 858; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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