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Expt. TRIGATRAP - Abteilung Blaum
Abstract:
The masses of 15 stable nuclides in the rare-earth region have been measured with the
Penning-trap mass spectrometer TRIGA-TRAP. This is the first series of absolute mass
measurements linking these nuclides to the atomic-mass standard 12C.
Previously, nuclear reaction studies almost exclusively determined the literature
values of these masses in the Atomic-Mass Evaluation. The TRIGA-TRAP results show
deviations on the order of 3–4 standard deviations from the latest published values
of the Atomic-Mass Evaluation 2003 for some cases. However, the binding-energy
differences that are important for nuclear structure studies have been confirmed
and improved. The new masses are discussed in the context of valence proton-neutron
interactions using double differences of binding energies, δVpn(Z,N).
