SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 50: Structure and Dynamics of Nuclei X
HK 50.1: Gruppenbericht
Mittwoch, 22. März 2023, 17:30–18:00, SCH/A215
Measuring Photo-Absorption Cross Sections with Tagged Photons at NEPTUN — •Martin Baumann1, Thomas Aumann1,2, Maike Beuschlein1, Isabelle Brandherm1, Meytal Duer1, Amrita Gupta1, Phillip Imgram1, Andrea Jedele1, Liancheng Ji1, Igor Jurosevic1, Marco Knösel1, Nikolina Lalic1, Enis Lorenz1, Hannes Mayr1, Leandro Milhomens da Fonseca1, Nikhil Mozumdar1, Ann Rochele Netto1, Oliver Papst1, Thomas Pohl1, Heiko Scheit1, Gerhart Steinhilber1, Sonja Storck-Dutine1, Dmytro Symochko1, Iyabo Usman3, and Patrick van Beek1 — 1Institut für Kernphysik, TU Darmstadt, Germany — 2GSI Helmholtzzentrum, Darmstadt, Germany — 3University of the Witwatersrand, Johannesburg, South Africa
The photon tagger NEPTUN at the superconducting linear electron accelerator S-DALINAC has been upgraded to enable high precision measurements of nuclear photo-absorption cross sections in the energy region up to 35 MeV, covering the giant dipole resonance region using tagged bremsstrahlung with a single configuration. For this purpose a new focal plane detector LARISSA and a rapid target changer PROTEUS have been commissioned. This setup has recently been used to measure the photo-absorption cross sections of the isotopes Sn-112,116,120,124,Ca-40 and Ca-48.
In this talk the method will be outlined and performance characteristics of the setup will be shown as well as preliminary data from the recent beam time.
This work was supported by the Deutsche Forschungsgemeinschaft under Contract No. SFB 1245 (Project ID No. 279384907)