Double -β Decay Q values of Te130, Te128, and Te120

N. D. Scielzo, S. Caldwell, G. Savard, J. A. Clark, C. M. Deibel, J. Fallis, S. Gulick, D. Lascar, A. F. Levand, G. Li, J. Mintz, E. B. Norman, K. S. Sharma, M. Sternberg, T. Sun, J. Van Schelt

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The double-β-decay Q values of Te130, Te128, and Te120 have been determined from parent-daughter mass differences measured with the Canadian Penning Trap mass spectrometer. The Xe132-Xe129 mass difference, which is precisely known, was also determined to confirm the accuracy of these results. The Te130 Q value was found to be 2527.01A±0.32 keV, which is 3.3 keV lower than the 2003 Atomic Mass Evaluation recommended value and is consistent with another recent Penning trap measurement. The Te128 and Te120 Q values were found to be 865.87A±1.31 and 1714.81A±1.25 keV, respectively. For Te120, this reduction in uncertainty of nearly a factor of 8 opens up the possibility of using this isotope for sensitive searches for neutrinoless double-electron capture and electron capture with β+ emission.

Original languageEnglish (US)
Article number025501
JournalPhysical Review C - Nuclear Physics
Issue number2
StatePublished - Aug 24 2009

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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