Dresden 2013 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 5: Struktur und Dynamik von Kernen
HK 5.6: Talk
Monday, March 4, 2013, 12:30–12:45, HSZ-301
Puzzle of B(E2) strengths of the symmetric and mixed-symmetry 2+ states in 94Zr — •Abdulrahman Scheikh Obeid, Andreas Krugmann, Peter von Neumann-Cosel, Norbert Pietralla, Iryna Poltoratska, and Vladimir Ponomarev — Institut f"ur Kernphysik, TU Darmstadt, Germany
Recently, Elhami et al. [1] reported on a study of the low-spin structure of 94Zr with the (n,n′,γ) reaction. The author claimed observation of an anomalous situation where the E2 excitation strength of the mixed-symmetry 22+ exceeds the strength of the symmetric 21+ state. Those excitations of 94Zr have been investigated with electron scattering at the S-DALINAC and a model-independent analysis of our (e,e′) data has been performed. The extracted ratio of the E2 strengths, B(E2, 01+→ 2ms+)/B(E2, 01+→ 21+) is less than the unity, which contradicts the (n,n′,γ) results. The data Analysis the results will be presented. The same analysis has been applied to a set of electron scattering data on 94Mo. The ratio of the of B(E2) strengths of the symmetric and mixed-symmetry 2+ states in 94Mo and their transition radius difference have been extracted for the first time.
[1] E. Elhami et al., Phys. Rev. C 78, 064303 (2008).