Abstract
The theory of octupolar-excitation ion-cyclotron-resonance mass spectrometry is presented which predicts an increase of up to several orders of magnitude in resolving power under certain conditions. The new method has been applied for a direct Penning-trap mass-ratio determination of the mass doublet. is a candidate for the search for neutrinoless double-electron capture. However, the measured value of 25.07(12) keV results in a half-life of years for a 1 eV Majorana-neutrino mass.
- Received 25 January 2011
DOI:https://doi.org/10.1103/PhysRevLett.107.152501
© 2011 American Physical Society