Mainz 2022 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 54: Nuclear Astrophysics III
HK 54.2: Vortrag
Mittwoch, 30. März 2022, 16:30–16:45, HK-H10
Proton capture on stored radioactive ions — •Sophia Florence Dellmann1, Jan Glorius2, Yuri Litvinov2, René Reifarth1, Thomas Stöhlker2,3, Laszlo Varga2, and Mario Weigand1 for the E127 collaboration — 1Goethe University Frankfurt, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung Darmstadt, Germany — 3Helmholtz-Institut Jena, Germany
By combining two unique facilities at GSI (Helmholtz Centre for Heavy Ion Research), the fragment separator FRS and the experimental storage ring ESR, the first direct measurement of a proton capture reaction of a stored radioactive isotope has been accomplished. The cross section of the 118Te(p,γ) reaction was measured at energies of astrophysical interest.
The ions were stored with energies of 6 and 7 MeV/nucleon and interacted with a hydrogen jet target. The produced 119I ions were detected with double-sided silicon strip detectors. The radiative recombination process of the fully stripped 118Te ions and electrons from the hydrogen target was used as a luminosity monitor. The proof-of-principle experiment had been performed in 2016 with the stable isotope 124Xe [1]. An overview of the experimental method and preliminary results from the ongoing analysis will be presented.
[1]J. Glorius et al., Phys. Rev. Lett. 122, 092701 (2019)