Mainz 2012 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 6: Struktur und Dynamik von Kernen
HK 6.5: Talk
Monday, March 19, 2012, 15:15–15:30, P 4
Investigation of low-energy dipole modes in the heavy deformed nucleus 154Sm via inelastic polarized proton scattering at zero degree * — •Andreas Krugmann1, Belash Bozorgian1, Anna Maria Krumbholz1, Dirk Martin1, Peter von Neumann-Cosel1, Norbert Pietralla1, Iryna Poltoratska1, Johannes Simonis1, and Atsushi Tamii2 — 1Institut für Kernphysik, TU Darmstadt — 2RCNP, Osaka University, Japan
A polarized proton scattering experiment has been performed on the heavy deformed nucleus 154Sm at extreme forward angles with 300 MeV protons at RCNP, Osaka[1]. Our scientific goal is to investigate the impact of ground state deformation on the properties of the pygmy dipole resonance and the spin M1 resonance showing a double-hump structure in heavy deformed nuclei. The (p,p’) cross sections can be decomposed into E1 and M1 parts in two independent ways based either on a multipole decomposition of the cross sections or spin transfer observables as has been demonstrated for the case of 208Pb [2]. We present first results of the angular distributions including zero degree and a preliminary analysis of polarization transfer observables.
[1] Experiment Proposal E350, RCNP, Osaka.
[2] A. Tamii, et al., Phys. Rev. Lett. 107, 062502 (2011).
* This work is supported by the DFG through SFB 634 and NE679/3-1.