with the Manitoba II high-resolution mass spectrometer have led to greater precision and
accuracy. The mass difference between Ge 76 and Se 76 has been redetermined to be
2038.56 (32) keV. When this new Q value is used to reexamine recent spectra reported by
groups searching for the characteristic sharp peak expected for neutrinoless double-beta
decay, no evidence for the occurrence of such a decay is found. New upper limits can be …