Bochum 2009 – scientific programme
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HK: Fachverband Hadronen und Kerne
HK 67: Poster Session
HK 67.43: Poster
Thursday, March 19, 2009, 14:00–16:00, Audi-Max
Measurement of the g(21+)-factor in 140Ba with the "Recoil-in-Vacuum" method — •Christopher Bauer, Norbert Pietralla, and Jörg Leske — Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
The "Recoil-in-Vacuum" method as described recently in [1][2] is used to determine the unknown magnetic moment of the 21+ state in the neutron-rich nucleus 140Ba. A Coulomb excitation experiment in inverse kinematics was performed at REX-Isolde (CERN) in 2007. Beams of 140,142Ba were impinging on a 0.9mg/cm2 96Mo target and a 1 mm Cu stopper. Gamma rays were detected by the MINIBALL array, a DSSSD was used for particle identification.
The microscopic structure of the 21+ state is investigated by the magnetic moment, which is sensitive to the composition of the wave function regarding proton and neutron configurations, and is compared to predictions from various calculations.
[1] N. J. Stone et al., Phys. Rev. Lett. 94, 192501 (2005)
[2] A. E. Stuchberry and N. J. Stone, Phys. Rev. C 76, 034307 (2007)