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HK: Fachverband Hadronen und Kerne

HK 67: Poster Session

HK 67.6: Poster

Thursday, March 19, 2009, 14:00–16:00, Audi-Max

Complete electric dipole response in ¹²⁰Sn: a test of the resonance character of the pygmy dipole resonance — •Anna Maria Heilmann — Institut für Kernphysik, Technische Universität Darmstadt, Germany

In high-resolution (p,p^′) experiments under 0^∘ the complete B(E1) strength distribution can be studied in stable nuclei. At RCNP Osaka, Japan, angular distributions including 0^∘ and polarization transfer observables for E1 excitations in ¹²⁰Sn were measured in an excitation energy range of 5–25 MeV. The systematics of the pygmy dipole resonance in stable Sn isotopes has been recently studied at the S-DALINAC[1]. From this study it was conclused that knowledge of the complete E1 response would be important to differentiate between relativistic an nonrelativistic QRPA models predicting largely different properties of the pygmy dipole resonance. Data analysis and first results on the E1 strength will be presented.
[1] B.Özel, Ph.D. Theses, University of Cukurova (2008).
^⋆ Supported by the DFG through SFB 634 and 446JAP 113/267/0-2.