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MS: Fachverband Massenspektrometrie
MS 6: Präzisionsmassenspektrometrie und grundlegende Anwendungen
MS 6.1: Invited Talk
Tuesday, March 11, 2008, 14:30–15:00, 3E
Penning Trap Mass Spectrometry for studies of short-lived nuclides — •Christine Weber — Department of Physics, University of Jyväskylä, Finland
The mass determination with a Penning trap spectrometer is based on a measurement of an ion’s cyclotron frequency in a strong, homogeneous magnetic field. In recent years dedicated setups have been installed at on-line facilities, for example at ISOLDE/CERN, JYFL/Jyväskylä, and SHIP/GSI, where exotic nuclides are provided for direct experimental studies. Relative mass uncertainties of δ m/m around 10−8 are typically achieved for short-lived species.
Atomic masses or binding energies are among the fundamental properties of nuclides with a given proton and neutron number (Z, N). Their accurate knowledge is required for studies of nuclear structure or the modeling of astrophysical processes. Here, the masses of more than 50 nuclides in the vicinity of the rp-process path have been determined with SHIPTRAP and JYFLTRAP. Furthermore, relative measurements of mass differences allow a precise Q-value determination of selected species, for example superallowed beta-emitters for weak-interaction studies. In this presentation recent results as well as further applications and planned setups such as TRIGATRAP/Mainz will be presented.