Updated evaluation of potential ultralow Q -value β -decay candidates

D. K. Keblbeck, R. Bhandari, N. D. Gamage, M. Horana Gamage, K. G. Leach, X. Mougeot, M. Redshaw

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


"Ultralow"Q-value β decays are referred to as such due to their low decay energies of less than ≈1 keV. Such a low energy decay is possible when the parent nucleus decays to an excited state in the daughter, with an energy close to that of the Q value. These decays are of interest as potential new candidates for neutrino mass determination experiments and as a testing ground for studies of atomic interference effects in the nuclear decay process. In this paper, we provide an updated evaluation of atomic mass data and nuclear energy-level data to identify potential ultralow Q-value β-decay candidates. For many of these candidates, more precise and accurate atomic mass data is needed to determine if the Q value of the potential ultralow decay branch is energetically allowed and in fact ultralow. The relevant precise atomic mass measurements can be achieved via Penning trap mass spectrometry.

Original languageEnglish
Article number015504
JournalPhysical Review C
Issue number1
StatePublished - Jan 2023


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