Bonn 2010 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 42: Struktur und Dynamik von Kernen VII

HK 42.4: Vortrag

Donnerstag, 18. März 2010, 14:45–15:00, HG II

New measurement of the 68Zn(4+) g factor and reinterpretation of previous data — •Kevin Moschner1, Karl-Heinz Speidel2, Jörg Leske3, Cristopher Bauer3, Christian Bernards1, Linus Bettermann1, Jan Jolie1, Thomas Möller3, Dennis Mücher1, and Peter Maier-Komor41Institut für Kernphysik, Universität zu Köln — 2Helmholtz Institut für Strahlen- und Kernphysik, Universität Bonn — 3Institut für Kernphysik, TU Darmstadt — 4Physik-Department, TU München

The g factor of the first excited 4+ state in 68Zn has been remeasured due to currently existing inconsistencies of earlier data [1-3]. Coulomb excitation in inverse kinematics of 68Zn beams provided by the Munich tandem accelerator has been applied in combination with the transient field technique. The multi-layered target used consisted of a thick carbon layer on copper backed gadolinium. Gamma rays were detected with large-volume Ge detectors in coincidence with forward scattered carbon ions. The g factors deduced from the observed spin precessions were compared with previous data whereby the inconsistencies in the 4+ g factor values could be removed by applying a novel analysis procedure to the measured field-up/-down ratios of each detector. Details of the experiment and results from the reanalysis will be discussed. The finally obtained g(4+) value and results for the first 2+ and the second 2+ states will be compared with large-scale shell model calculations.

[1] J. Leske et al., Phys. Rev. C 71, 034303 (2005)

[2] J. Leske et al., Phys. Rev. C 72, 044301 (2005)

[3] P. Boutachkov et al., Phys. Rev. C 75, 021302(R) 2007

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