Münster 2017 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 4: Structure and Dynamics of Nuclei I
HK 4.6: Vortrag
Montag, 27. März 2017, 18:15–18:30, F 2
Measurement of the E1 Strength in 112Sn with NEPTUN — •Diego Semmler1, Thomas Aumann1, 2, Martin Baumann1, Michael Beckstein1, Yevhen Kozymka1, Philipp Kuchenbrod1, Norbert Pietralla1, Heiko Scheit1, Saket Suman1, Dmytro Symochko1, and Sebastian Vaupel1 — 1TU Darmstadt, Darmstadt, Germany — 2GSI, Darmstadt, Germany
The low energy photon tagger NEPTUN at the S-DALINAC delivers a quasi-monoenergetic photon beam between about 1 MeV and 20 MeV with a resolution of approximately 25 keV. In this talk results from (γ, γ’)-reactions in the commissioning with 32S and the first measurement with 112Sn targets will be presented. An excitation energy range from 7.6 MeV to 9.6 MeV has been covered.
This measurement helps to understand the discrepancy observed in the data on E1 strength distribution obtained in recent NRF [1] and (p, p’) scattering [2] experiments. It shows that experiments with (quasi-)monochromatic γ-beams are required in this energy regime.
Supported by DFG (CRC 1245)
[1] B. Özel-Tashenov et al. "Low-energy dipole strength in 112,120Sn". In: Physical Review C 90 (2014)
[2] A. M. Krumbholz et al. "Low-energy electric dipole response in 120Sn". In: Physics Letters B 744 (2015), pp. 7 – 12