Atomic mass and double-beta-decay Q value of Ca-48

作者：Redshaw Matthew^*; Bollen Georg; Brodeur Maxime; Bustabad Scott; Lincoln David L; Novario Samuel J; Ringle Ryan; Schwarz Stefan

来源：Physical Review C, 2012, 86(4): 041306.

DOI：10.1103/PhysRevC.86.041306

The possibility of detecting neutrinoless double-beta-decay (0 nu beta beta-decay) in experiments that are currently in operation or under development provides the exciting opportunity to determine the Dirac or Majorana nature of the neutrino and its absolute mass scale. An important datum for interpreting 0 nu beta beta-decay experimental results is the Q value of the decay. Using Penning trap mass spectrometry we have measured the atomic mass of Ca-48 to be M[Ca-48] = 47.952 522 76(21) u which, combined with the mass of Ti-48 evaluated by Audi et al. [Nucl. Phys. A 729, 337 (2003)], provides a new determination of the Ca-48 beta beta-decay Q value: Q(beta beta) = 4262.96(84) keV.

• 出版日期2012-10-31