Abstract
The double--decay values of , , and have been determined from parent-daughter mass differences measured with the Canadian Penning Trap mass spectrometer. The mass difference, which is precisely known, was also determined to confirm the accuracy of these results. The value was found to be 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 and values were found to be and keV, respectively. For , 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 emission.
- Received 6 July 2009
DOI:https://doi.org/10.1103/PhysRevC.80.025501
©2009 American Physical Society