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Mainz 2022 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 50: Structure and Dynamics of Nuclei VIII

HK 50.5: Talk

Wednesday, March 30, 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 Tornow21Institut 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).

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