Münster 2011 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 9: Struktur und Dynamik von Kernen II
HK 9.5: Vortrag
Montag, 21. März 2011, 17:45–18:00, O-1
E2 ratios and transition radii differences for one-phonon states of spherical nuclei from electron scattering at low momentum transfer — •Abdulrahman Scheikh Obeid, Oleksiy Burda, Maksym Chernykh, Andreas Krugmann, Peter von Neumann-Cosel, Norbert Pietralla, Iryna Poltoratska, Vladimir Ponomarev, and Christopher Walz — IKP, TU Darmstadt, 64289 Darmstadt, Germany
In order to extract the E2 excitation strength of isospin-polarized one-phonon states from electron scattering spectra we measure their scattering cross section. In a model-independent way the ratio of the E2 strengths of the symmetric and mixed-symmetric 2+ states in a spherical nucleus is directly proportional to the ratio of the peak areas of the states observed in inclusive electron scattering reactions at low momentum transfer. This procedure reduces the systematic errors included in the absolute cross sections. For data on 92Zr this ratio which is related to the strength of the proton-neutron interaction is about 2 times more precise than the one extracted from lifetime informations [1]. From sufficiently precise data we can deduce the difference of the E2 transition radii for the two one-phonon states. This is demonstrated on the data for the N=52 isotone 94Mo [2].
Support By the DFG under Grant No. SFB 634, By the Helmholtz International Center for FAIR.
[1] C. Fransen et al.,Phys. Rev. C 71 054304 (2005).
[2] O. Burda et al., Phys. Rev. Lett. 99 029503 (2007).