Abstract
The absolute masses of four long-lived transuranium nuclides, , , , and , in the vicinity of the deformed neutron shell closure have been measured directly with the Penning-trap mass spectrometer TRIGA-TRAP. Our measurements confirm the AME2012 mass values of and within one standard deviation, which were indirectly determined, by decay spectroscopy studies. In the case of the mass, a discrepancy of more than three standard deviations has been observed, affecting absolute masses even in the superheavy element region. The implementation of the mass values into the AME2012 network yields a reduced mass uncertainty for 84 nuclides, particularly for and its strongly correlated decay chains.
1 More- Received 16 April 2014
DOI:https://doi.org/10.1103/PhysRevC.89.064318
©2014 American Physical Society