München 2006 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 49: Kernphysik/Spektroskopie
HK 49.1: Gruppenbericht
Donnerstag, 23. März 2006, 17:00–17:30, C
Investigation of mixed-symmetry states in 94Mo by means of high-resolution electron and proton scattering* — •O. Burda1, N. Botha2, J. Carter3, R.W. Fearick2, S.V. Förtsch4, C. Fransen5, H. Fujita3,4, M. Kuhar1, A. Lenhardt1, P. von Neumann-Cosel1, R. Neveling4, N. Pietralla6, V.Yu. Ponomarev1, A. Richter1, E. Sideras-Haddad3, R. Smit4, and J. Wambach1 — 1Institut für Kernphysik, Technische Universität Darmstadt — 2Physics Department, University of Cape Town — 3School of Physics, University of the Witwatersrand — 4iThemba LABS, Somerset West — 5Institut für Kernphysik, Universität zu Köln — 6Department of Physics and Astronomy, SUNY Stony Brook
The nucleus 94Mo is a well studied example for the existence
of one-phonon and two-phonon mixed-symmetry (ms) states [1].
High-resolution electron scattering (at the S-DALINAC) and proton
scattering (at the iThemba LABS) experiments were performed
studying the excitation of 2+ states. Energy resolutions
ΔE ≈ 30 keV (FWHM) were achieved. Due to
sensitivity of (e,e′) and (p,p′) reactions to
the one-phonon components of the wave function a combined analysis
of the measured form factors and angular distributions provides a
unique test of the phonon character of the ms state and its
assumed isovector character in the valence shell. Furthermore, the
purity of two-phonon states can be extracted. Comparison to QPM,
shell-model and IBA-2 calculations is presented.
C.Fransen et al, Phys. Rev. C 67 (2003) 024307.
*Supported by the DFG through SFB 634 and Ne 679/2-1.