Köln 2004 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 23: Nuclear Structure/Spectroscopy IV
HK 23.3: Vortrag
Mittwoch, 10. März 2004, 11:30–11:45, A
First g Factor Measurements with the MINIBALL Detector Array for Stable 48Ti Beams+ — •J. Leske1, K.-H. Speidel1, O. Kenn1, S. Schielke1, J. Jolie2, N. Warr2, A. Scherillo2, P. Maier-Komor3, and J. Gerber4 — 1Helmholtz-Institut für Strahlen- und Kernphysik, Univ. Bonn, D-53115 Bonn — 2Institut für Kernphysik, Univ. Köln, D-50937 Köln — 3Institut de Recherches Subatomiques, F-67037 Strasbourg, France — 4Physik-Dept. Technische Univ. München, D-85748 Garching
MINIBALL is an efficient detector array for the detection of γ rays especially designed for measurements with low-intensity radioactive beams. For gaining experience with MINIBALL for future experiments at REX ISOLDE test measurements were performed at the Cologne tandem accelerator (where the array was stationed temporarily) by redetermining the known g factor of 48Ti(21+)[1] in conditions similar to those at the CERN facility. Four out of six modules of this array have been used, each module consisting of three 6-fold segmented Ge detectors. These were placed in pairs symmetric to the beam direction operated in coincidence with recoil ions detected in an annular Si detector at 0∘. 48Ti beams of 100 MeV were Coulomb excited to the 21+ state by scattering from a carbon layer of a multi-layered target. Ferromagnetic iron provided the transient field for the spin precession. Particle-γ-angular correlations were determined from the different angle positions of the individual Ge detectors of the modules.
+ supported by the BMBF under 06BN111
[1] R. Ernst et al., Phys. Rev. Lett. 84 (2002) 416