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First use of post-accelerated isomeric beams for Coulomb excitation studies of odd-odd nuclei around N=40

Abstract : We report on the first use of post-accelerated radioactive isomeric beams. Long-lived isomeric states in $^{68}$Cu and $^{70}$Cu have been produced and separated at ISOLDE, CERN. Subsequently they were post-accelerated to 2.86 MeV/u and sent to a target in the center of the MINIBALL spectrometer, used for the detection of the $\gamma$-rays of interest. The preliminary results from the Coulomb excitation of the I$\pi=6^-$, 1$^+$ states in $^{68}$Cu and the I$\pi=6^-$ one in $^{70}$Cu, compared to a large-scale shell model calculations, hint the importance of the excitations across the Z=28 gap for the understanding of the nuclear structure in the neutron-rich N=40 region.
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http://hal.in2p3.fr/in2p3-00128987
Contributor : Dominique Girod <>
Submitted on : Monday, February 5, 2007 - 1:29:36 PM
Last modification on : Wednesday, September 16, 2020 - 4:17:24 PM

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G. Georgiev, I. Stefanescu, D.L. Balabanski, P. Butler, J. Cederkall, et al.. First use of post-accelerated isomeric beams for Coulomb excitation studies of odd-odd nuclei around N=40. International Journal of Modern Physics E, World Scientific Publishing, 2006, 15, pp.1505-1512. ⟨10.1142/S0218301306005095⟩. ⟨in2p3-00128987⟩

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