First direct ${}^7$Be electron capture $Q$-value measurement towards high-precision BSM neutrino physics searches

R. Bhandari, G. Bollen, T. Brunner +12

We report the first direct measurement of the nuclear electron capture (EC) decay $Q$-value of ${}^7$Be $\to$ ${}^7$Li via high-precision Penning trap mass spectrometry (PT…