Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 32: Struktur und Dynamik von Kernen
HK 32.7: Vortrag
Dienstag, 5. März 2013, 15:45–16:00, HSZ-401
Do we understand gamma strength functions? The case of 96Mo ⋆ — •Dirk Martin1, Andreas Krugmann1, Anna Maria Krumbholz1, Peter von Neumann-Cosel1, Norbert Pietralla1, Iryna Poltoratska1, Vladimir Ponomarev1, and Atsushi Tamii2 — 1Institut für Kernphysik, TU Darmstadt — 2Research Center for Nuclear Physics, Osaka, Japan
The gamma strength function of 96Mo derived from a variety of experimental methods show quite severe disagreement, in particular near the neutron threshold. A new experimental method is discussed, viz. relativistic proton scattering under extreme forward angles at RCNP Osaka, Japan [1], which allows a consistent analysis of data below and above the particle threshold. Here, intermediate-energy proton beams are used in combination with a high energy resolution of the order Δ E/E ≈ 8 · 10−5. E1 and M1 strength distributions can be determined by a multipole decomposition of angular distributions utilizing DWBA calculations [2]. The additional measurement of polarization transfer observables provides an independent check of the method. First results from a recent experiment are presented.
[1] A. Tamii et al., Nucl. Inst. Meth. A 605, 326 (2009).
[2] A. Tamii et al., Phys. Rev. Lett. 107, 062502 (2011).
⋆ Supported by DFG through SFB 634 and NE 679/3-1.