Recent developments in precision mass spectrometry of radioactive isotopes (RI) and some
selected related physics subjects are reviewed. In the last decades, besides conventional …

Neutrino self-interactions (ν SI) beyond the Standard Model are an attractive possibility to
soften cosmological constraints on neutrino properties and also to explain the tension in late …

In anticipation of results from current and future double-β decay studies, we report a
measurement resulting in a Se 82 double-β decay Q value of 2997.9 (3) keV, an order of …

“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 …

The low-energy beam and ion trap facility, LEBIT, has been used to perform high-precision
Penning trap mass spectrometry using rare isotopes produced by fast-beam fragmentation …

We report a direct measurement of the Q β β value of the neutrinoless double-β-decay
candidate 48 Ca at the TITAN Penning-trap mass spectrometer, with the result that Q β β …

Nuclear β-decay provides a laboratory for investigating weak decays occurring inside the
nuclear medium. This provides information on the resulting subtle nuclear and atomic …

Observable effects for the Lorentz invariance violation (LIV) at a low energy scale can also
be investigated in double beta decay. For example, by comparing the theoretical predictions …

Among the wide energy range of β decays, there can exist decays with Q values as low as a
few hundred eV. These decays can occur when the parent decays to a excited state in the …

Neutrinoless double beta decays requires lepton number violation and provide an important
probe for physics beyond the Standard Model. Nuclear matrix elements (NME) are needed …