3/21/2011| Institut für Kernphysik, TU-Darmstadt, A. Scheikh Obeid| • Motivation • Experiment 92 Zr • Analysis and results • Summary and outlook supported by DFG (SFB 634) and LOEWE (HIC for FAIR) E2 ratios and transition radii differences for one-phonon states of spherical nuclei from electron scattering at low momentum transfer Abdulrahman Scheikh Obeid, O. Burda, M. Chernykh, A. Krugmann, P. von Neumann-Cosel, N. Pietralla, I. Poltoratska, V. Ponomarev and C. Walz Institut für Kernphysik, TU Darmstadt, Germany
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3/21/2011| Institut für Kernphysik, TU-Darmstadt, A. Scheikh Obeid|
• Motivation• Experiment 92Zr• Analysis and results• Summary and outlook
supported by DFG (SFB 634) and LOEWE (HIC for FAIR)
E2 ratios and transition radii differences for one-phonon states of spherical nuclei from electron scattering at low momentum transfer
Abdulrahman Scheikh Obeid, O. Burda, M. Chernykh, A. Krugmann, P. von Neumann-Cosel, N. Pietralla, I. Poltoratska, V. Ponomarev and C. Walz Institut für Kernphysik, TU Darmstadt, Germany
3/21/2011| Institut für Kernphysik, TU-Darmstadt, A. Scheikh Obeid|
Mixed-symmetry states in vibrational nuclei
0
12
ms,12
p
n p
n
N. Pietralla, C. Fransen et al.
3/21/2011| Institut für Kernphysik, TU-Darmstadt, A. Scheikh Obeid|
92Zr
3.4 ± 0.4 Wu
1
2
2
2
6.4 ± 0.5 Wu
0.37 µN2
1
0
1847.3
934.46
E2
M1
3/21/2011| Institut für Kernphysik, TU-Darmstadt, A. Scheikh Obeid|
Experiment 92Zr(e,e´)
3.4 ± 0.4 Wu
1
2
2
2
6.4 ± 0.5 Wu
0.37 µN2
1
0
1847.3
934.46
E2
M1
3/21/2011| Institut für Kernphysik, TU-Darmstadt, A. Scheikh Obeid|
Model- dependent DWPA Analysis
....22/9137.0 2
2/5277.01
2
gd
....22/9153.0 2
2/5262.02
2
gd
*V. Ponomarev, priv. comm.
*Form factors from QPM
3/21/2011| Institut für Kernphysik, TU-Darmstadt, A. Scheikh Obeid|
Model-independent extraction of E2 excitation strength
3/21/2011| Institut für Kernphysik, TU-Darmstadt, A. Scheikh Obeid|
The ratio of momentum-transfer dependentCoulomb correction factors is very close to 1In region of intereset.
Coulomb correction factors
3/21/2011| Institut für Kernphysik, TU-Darmstadt, A. Scheikh Obeid|
Model-independent relative extraction of E2 excitation strength
~
3/21/2011| Institut für Kernphysik, TU-Darmstadt, A. Scheikh Obeid|
Results
3/21/2011| Institut für Kernphysik, TU-Darmstadt, A. Scheikh Obeid|
More data
3/21/2011| Institut für Kernphysik, TU-Darmstadt, A. Scheikh Obeid|
Summary an outlook
High-resolution electron scattering experiments performed on 92Zr
Model-independent: B(E2) B(E3) extracted
Model-dependent: B(E2 ) extracted, neu observable: Transtion radius
