Direct mass measurements of cadmium and palladium isotopes and their   double-beta transition Q-values
  The Q-value of the double-electron capture in Cd-108 has been determined to be (272.04 +/- 0.55) keV in a direct measurement with the double-Penning trap mass spectrometer TRIGA-TRAP. Based on this result a resonant enhancement of the decay rate of Cd-108 is excluded. We have confirmed the double-beta transition Q-values of Cd-106 and Pd-110 recently measured with the Penning-trap mass spectrometers SHIPTRAP and ISOLTRAP, respectively. Furthermore, the atomic masses of the involved nuclides Cd-106, Cd-108, Cd-110, Pd-106, Pd-108 and Pd-110 have been directly linked to the atomic mass standard. 
C. Smorra, T. Beyer, K. Blaum, M. Block, Ch.E. D\"ullmann, K.   Eberhardt, M. Eibach, S. Eliseev, Sz. Nagy, W. N\"ortersh\"a...
nucl-ex