Direct Measurement of the ${}^{212}\mathrm{Pb}$ and ${}^{214}\mathrm{Pb}$ $\beta$ Decay Branching Ratios with the XENONnT Experiment

E. Aprile, J. Aalbers, K. Abe +178

We present precision measurements of ${}^{212}\mathrm{Pb}$ and ${}^{214}\mathrm{Pb}$ $\beta$ decay branching ratios using ${}^{220}\mathrm{Rn}$ and ${}^{222}\mathrm{Rn}$ calibration data from…