Extended Data Table 1 Characteristics of the isobaric β-decay chains

From: Observation of the radiative decay of the 229Th nuclear clock isomer

  1. The A = 229, A = 230 and A = 231β-decay chains used in this study are listed. *Value is taken from32. †Value(s) are taken from42. ‡Absolute γ-ray intensity per β decay is given. §The uncertainty on the production rate is estimated at 20%, the implantation-to-implantation variation of the beam intensity rises up to a factor of 3. ∥γ-ray intensities from 229Ra are not known from literature, the production rate therefore is determined using 229Ac γ rays observed after the decay of 229Ra. #The lower limit is deduced from the time evolution of the 569 keV γ ray in the decay of 229Ac. ⋆No uncertainties are given in the database.
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