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HK: Fachverband Physik der Hadronen und Kerne

HK 50: Structure and Dynamics of Nuclei VIII

HK 50.5: Vortrag

Mittwoch, 30. März 2022, 17:15–17:30, HK-H6

Correlation experiments in photofission — •Vincent Wende¹, Marius Peck¹, Joachim Enders¹, Sean W. Finch², Alf Göök³, Calvin R. Howell², Maximilian Meier¹, Andreas Oberstedt⁴, Stephan Oberstedt⁵, Norbert Pietralla¹, Jack A. Silano⁶, Anton P. Tonchev⁶, and Werner Tornow² — ¹Institut für Kernphysik, TU Darmstadt, Darmstadt, Germany, — ²Triangle Universities Nuclear Laboratory, Duke University, Durham, NC, USA, — ³KTH Stockholm, Stockholm, Sweden, — ⁴ELI-NP, IFIN-HH, Magurele, Romania, — ⁵EC-JRC Geel, Belgium — ⁶Lawrence Livermore National Laboratory, Livermore, CA, USA

Photon-induced reactions provide precision data on nuclear fission due to their selectivity on excitations of low multipolarity. Quasi-monochromatic polarized photon beams allow one to extract information about the transition states and channels through which the fission proceeds. To this end, the masses, total kinetic energy, and polar as well as azimuthal angular distributions of the fission fragments were measured simultaneously in a position-sensitive twin Frisch-grid ionization chamber [1]. We present first results of a pioneering ²³⁸U(γ,f) experiment at the High-Intensity γ-Ray Source (HIγS) at an excitation energy of 11.2 MeV [2].
[1] A. Göök et al., Nucl. Instrum. Methods A 830, 366 (2016); M. Peck et al., EPJ Web of Conferences 239, 05011 (2020).
[2] M. Peck, Dissertation, TU Darmstadt (2020).
Supported by DFG (05P18RDEN9) and HMWK (LOEWE Cluster Nuclear Photonics).