Hannover 2010 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 3: Neue massenspektrometrische Methoden und Entwicklungen
MS 3.1: Hauptvortrag
Dienstag, 9. März 2010, 14:00–14:30, F 428
TOF-Bρ mass measurements of neutron rich nuclei at the NSCL — •Sebastian George1,2, Alfredo Estrade1,2,3, Milan Matoš4, Mathew A. Amthor5, Daniel Bazin1, Ana D. Becerril1,2,3, Thom J. Elliot1,2,3, Alexandra Gade1, Daniel Galaviz1,2, Giuseppe Lorusso1,2,3, Jorge Pereira1,2, Mauricio Portillo1, Andrew Rogers1,2,3, Hendrik Schatz1,2,3, Dan Shapira6, Edward Smith7, Andreas Stolz1, and Mark S. Wallace8 — 1National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI, USA — 2Joint Institute for Nuclear Astrophysics (JINA) — 3Department of Physics and Astronomy, Michigan State University, East Lansing, MI, USA — 4Louisiana State University, Baton Rouge, LA, USA — 5Grand Accelerateur National d’Ions Lourds, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5, France — 6Oak Ridge National Laboratory, Oak Ridge, TN, USA — 7The Ohio State University, Columbus, OH, USA — 8Los Alamos National Laboratory, Los Alamos, NM, USA
Nuclear masses of exotic nuclei far from stability are important key parameters for the understanding of the nuclear structure and several questions in nuclear astrophysics. Particularly the description of astrophysical processes, such as nucleosynthesis during the r-process or the evolution of matter in the crust of accreting neutron stars, is limited by the use of theoretical mass models. The experimental access to the mass of atoms is based on different techniques. Beside the measurements of nuclear decays and nuclear reaction studies, Penning trap facilities and time-of-flight (TOF) experiments allow the determination of masses. The latter two are somewhat complementary methods in respect of precision and accessibility of exotic nuclei. The time-of-flight-Bρ (TOF-Bρ) method has shown the potential to access nuclides very far from stability at several radioactive beam facilities. Here the setup of the TOF-Bρ experiment at the National Superconducting Cyclotron Laboratory (NSCL) at the Michigan State University is presented. The results of the first experiment in the region of neutron-rich isotopes as well as upcoming measurements will be discussed.