Mainz 2022 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 54: Nuclear Astrophysics III
HK 54.3: Vortrag
Mittwoch, 30. März 2022, 16:45–17:00, HK-H10
Nearly background-free measurement of proton-capture reactions using the Experimental Storage Ring — •Laszlo Varga1, Sophia Florence Dellmann2, Jan Glorius1, Yuri A. Litvinov1, René Reifahrt2, and Thomas Stöhlker1,3 for the E127 collaboration — 1GSI Helmholtzzentrum für Schwerionenforschung Darmstadt, Germany — 2Goethe University Frankfurt, Germany — 3Helmholtz-Institut Jena, Germany
After the successful campaign for proton-capture measurements on stored stable beams at the Experimental Storage Ring at GSI in 2009 and 2016 [1-2], new experiments have been carried out in 2020 and 2021 using a radioactive ion beam. The complex spatial ion hit distributions on the employed UHV-compatible double sided silicon strip detectors (DSSSD) have been modeled through Monte-Carlo based ion-optical simulations using the MOCADI code [3]. To improve the sensitivity of the experimental method the "Elimination of the Rutherford elAstic ScattEring" (ERASE) technique has been developed. With the application of ERASE the sensitivity for the ions of interest is dramatically increased. The suitability of the method was demonstrated in 2020 and in 2021. In this talk, the measured ion-hit spectra of the DSSSD will be introduced focusing on the effects of the ERASE technique. The newly developed method is a powerful tool to study the proton-capture efficiently on nuclei hardly accessible in large quantities.
[1] - Mei B et al 2015 Phys. Rev. C92 035803
[2] - Glorius J et al 2019 Phys. Rev. Lett. 122 092701
[3] - Iwasa N et al 1997 NIM B 126 284-289