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ISOLDE Seminar
Penning-trap mass measurements of neutron-rich cadmium
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Europe/Zurich
26-1-022 (CERN)
26-1-022
CERN
Description
The goal of this talk is to present the experimental work done for the precision mass measurements of neutron-rich cadmium (129−131Cd) isotopes. The measurements were performed at the on-line radioactive ion-beam facility ISOLDE/CERN by using the four-trap mass spectrometer ISOLTRAP. A detailed description of the spectrometer and the measurement technique will be presented. The cadmium measurements will be highlighted and their significant deviation to previous measurements in the region will be discussed. A description will be given of their relevance for the nucleosynthesis of heavy elements around the mass peak A = 130 in the Solar System abundance. The physics discussion will present a review of the astrophysical rapid-neutron capture process believed to produce these elements. I will emphasize the nuclear mass input used in the astrophysical calculations to estimate one-neutron separation energies. The latter is an important quantity which determines the path of the r-process on the neutron-rich side of the nuclidic chart. I will discuss the influence that such a nuclear physics input has to r-process calculations.