Precision mass measurements of
n-rich nuclei from
N=50 to N=82, J.
of Physics, University of
Jyvaskyla, Jyvaskyla, Finland − Our knowledge of binding
neutron-rich nuclei has experienced a major revision during the
last five years
due to the introduction of Penning-trap based mass measurements.
As an example,
new mass values for nearly 300 nuclides produced in fission
uncertainties of 10 keV or less have become available. The data
three Penning trap facilities at Jyvaskyla, CERN-ISOLDE and
Argonne cover all
isotopic chains from Ni to Pr, except iodine. In this talk the
data is reviewed
and discussed using the mass differentials such as neutron and
binding energy as well as odd-even staggering of masses to probe
of the N=50 and N=82 shell gaps and associated pairing effects.