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Proton capture measurements on stored ions for the γ-process nucleosynthesis

Varga, László

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The cross sections of proton-capture reactions are extremely important to model explosive nucleosynthesis, in particular for the poorly understood production of the rare p-nuclei. Taking advantage of the unique possibilities at the Experimental Storage Ring (ESR) at GSI, the so-called proton-capture campaign has been started in 2009 focusing on the study of (p,γ) reactions for hot, explosive stellar scenarios. In this thesis, the recent experiment of the campaign, performed in March 2020, is analyzed and discussed in detail. The (p,γ) and (p,n) reaction cross-sections have been successfully measured at 10 MeV/u using a stable 124Xe ion beam and for the first time also using a radioactive ion beam, namely 118Te with 6 days half-life. In addition, a novel experimental scheme to improve the sensitivity of the method has been developed. Using the stable 124Xe beam it is demonstrated that the application of this new technique enables measurement at maximum sensitivity for proton-induced reactions in inverse kinematics.

Document type: Dissertation
Supervisor: Litvinov, Apl. Prof. Dr. Yuri A.
Place of Publication: Heidelberg
Date of thesis defense: 15 July 2021
Date Deposited: 27 Jul 2021 13:11
Date: 2021
Faculties / Institutes: The Faculty of Physics and Astronomy > Dekanat der Fakultät für Physik und Astronomie
DDC-classification: 500 Natural sciences and mathematics
530 Physics
Controlled Keywords: proton capture, storage ring, γ-process nucleosynthesis, p-process, GSI, Experimental Storage Ring, ESR
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