München 2006 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 52: Instrumentation und Anwendungen
HK 52.6: Vortrag
Donnerstag, 23. März 2006, 18:15–18:30, H
First on-line test of the FRS Ion Catcher with relativistic nickel fragments — •M. Petrick1, K.-H. Behr2, A. Brünle2, L. Caceres2, J. Clark3, Z. Di1, S. Elisseev2, M. Facina4, A. Fettouhi2, H. Geissel2, W. Hüller2, M. Huyse4, C. Karagiannis2, B. Kindler2, R. Knöbel2, Y. Kudrayavtse4, J. Kurcewicz2, T. Levant3, Yu.A. Litvinov2, B. Lommel2, M. Maier2, D. Morrissey5, G. Münzenberg2, W.R. Plaß1, M. Portillo5, G. Savard3, C. Scheidenberger2, P. Van Duppen4, H. Weick2, M. Winkler2, and B. Zabransky3 — 1JLU, Giessen — 2GSI, Darmstadt — 3Argonne Nat. Lab. — 4Katho. Uni. Leuven — 5MSU
A key element of the Low-Energy-Branch of the FAIR-facility will be the energy buncher and the stopping cell for in-flight separated exotic nuclei. This device will provide high quality beams of short-lived nuclei for high precision experiments such as decay spectroscopy, direct mass measurements and laser-spectroscopy. For the first time the FRS Ion-Catcher was tested in an on-line experiment. 200 MeV/u projectile were produced by fragmentation of a 58Ni-beam in an AL target, stopped in a helium-filled gas cell and extracted with a few eV through a RF-quadrupol ion distribution system, which allowed to connect a silicon surface barrier detector and a time-of-flight mass spectrometer. In the experiment, the efficiency of the setup, molecule and aduct-formation in and extraction times from the gas cell were investigated. As a proof-of-principle, the half-life of 54 Co was determined. In this presentation an overview of the experiment run and its results will be given.