Mainz 2012 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 47: Poster – Struktur und Dynamik von Kernen
HK 47.3: Poster
Donnerstag, 22. März 2012, 14:00–16:00, P Foyer
Investigation of the reaction 144Sm(p,p′) under extreme forward angles ⋆ — •Dirk Martin1, Carlos Bertulani3, Belash Bozorgian1, Andreas Krugmann1, Anna Maria Krumbholz1, Peter von Neumann-Cosel1, Norbert Pietralla1, Iryna Poltoratska1, Johannes Simonis1, and Atsushi Tamii2 — 1Institut für Kernphysik, TU Darmstadt — 2Research Center for Nuclear Physics, Osaka, Japan — 3Texas A&M University, USA
Recent experimental progress and development at RCNP Osaka, Japan [1], allows measurements with intermediate-energy proton beams at very forward angles combined with high energy resolution of the order Δ E/E ≈ 8 · 10−5.
Using this setup, the total electric and magnetic dipole strength distributions can be extracted. In comparison with a simultaneous measurement on the well-deformed nucleus 154Sm, an experimental study of 144Sm allows to investigate the influence of the deformation on these strength distributions. Differential cross sections under 0∘ – 4∘ were determined. By comparison to theoretical predictions of Coulomb excitation using the eikonal approximation [2], the E1 character of the cross sections in the region of the GDR can be confirmed. A qualitative comparison to E1 strength obtained in 144Sm(γ,γ′) experiments at the S-DALINAC [3] is discussed.
[1] A. Tamii et al., Nucl. Inst. Meth. A 605, 326 (2009).
[2] C. A. Bertulani et al., Comp. Phys. Comm. 152 (2003) 317-340.
[3] S. Volz et al., Nucl. Phys. A 779 (2006) 1.
⋆ Supported by DFG through SFB 634 and NE 679/3-1.