Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 31: Struktur und Dynamik von Kernen
HK 31.6: Vortrag
Mittwoch, 19. März 2014, 18:15–18:30, HZ 4
Gamma Strength Function of 96Mo: A Test of the Axel-Brink Hypothesis ⋆ — •Dirk Martin1, Andreas Krugmann1, Anna Maria Krumbholz1, Peter von Neumann-Cosel1, Norbert Pietralla1, Iryna Poltoratska1, Vladimir Ponomarev1, and Atsushi Tamii2 for the E376 collaboration — 1Institut für Kernphysik, TU Darmstadt — 2Research Center for Nuclear Physics, Osaka, Japan
The gamma strength function of 96Mo, derived from a variety of experiments, shows 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 cross sections can be determined by a multipole decomposition of angular distributions utilizing DWBA calculations [2,3]. The additional measurement of polarization transfer observables provides an independent check of the method. Results for the gamma strength function of 96Mo derived from the E1 cross sections are presented and compared to findings with other experimental techniques.
[1] A. Tamii et al., Nucl. Inst. Meth. A 605 (2009) 326.
[2] A. Tamii et al., Phys. Rev. Lett. 107 (2011) 062502.
[3] I. Poltoratska et al., Phys. Rev. C 85 (2012) 041304(R).
⋆ Supported by DFG through SFB 634 and NE 679/3-1.