Münster 2002 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 10: Poster Session: Nuclear Physics/Spectroscopy
HK 10.27: Poster
Dienstag, 12. März 2002, 10:30–12:45, Foyer Chemie
Electric dipole strength in medium mass nuclei* — •T. Hartmann1, M. Babilon1, C. W. Beausang2, J. R. Cooper2, C. Hutter1, R. Krücken2, P. Mohr1, and A. Zilges1 — 1Institut für Kernphysik, Schlossgartenstr.9, 64289 Darmstadt — 2Physics Department - WNSL, Yale University, New Haven, Connecticut 06520-8124
Recent photon scattering (γ,γ′) studies focused on low lying collective electric dipole strength in medium mass nuclei [1,2]. Electric dipole transitions are signs for breaking the p-n-symmetry in a nucleus. Possible explanations are a coupling of two vibrational phonons or a vibration of a neutron skin against an inert core. For an understanding of the origin of the observed E1 strength it is nessessary to gain information about the detailed γ-decay pattern. We performed a 48Ca(p,p’γ)48Ca test experiment at the YRAST-Ball at Yale University to find out if an excitation with hadronic probes allow to detect weak decay branches.
*Supported by DFG (Zi510/2-1 and FOR272/2-1) and by the US DOE (DE-FG02-91ER-40609).
[1] T. Hartmann, J. Enders, P. Mohr, K. Vogt, S. Volz, and A. Zilges, Phys. Rev. Lett. 85, 274 (2000); Erratum Phys. Rev. Lett. 86, 4981 (2001).
[2] T. Hartmann, J. Enders, P. Mohr, K. Vogt, S. Volz, and A. Zilges, Phys. Rev. C, in press.