Dresden 2013 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

HK: Fachverband Physik der Hadronen und Kerne

HK 5: Struktur und Dynamik von Kernen

HK 5.6: Vortrag

Montag, 4. März 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⁺→ 2_ms⁺)/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).