Q(EC) value of the superallowed beta emitter Sc-42
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2017 American Physical Society. The QEC value of the superallowed + emitter Sc42 has been measured with the JYFLTRAP Penning-trap mass spectrometer at the University of Jyvskyl to be 6426.350(53) keV. This result is at least a factor of four more precise than all previous measurements, which were also inconsistent with one another. As a byproduct we determine the excitation energy of the 7+ isomeric state in Sc42 to be 616.762(46) keV, which deviates by 8 from the previous measurement.