Speaker
Ms
Ganna Rastrepina
(GSI Helmholtzzentrum für Schwerionenforschung GmbH)
Description
Storage rings offer the possibility of measuring proton- and alpha-induced reactions in inverse kinematics. The combination of his approach with a radioactive beam facility allows, in principle, the determination of the respective cross sections for radioactive isotopes. Such data are highly desired for a better understanding of astrophysical nucleosynthesis processes like the p process.
A pioneering experiment has been performed at the Experimental Storage Ring (ESR) at GSI using a stable 96Ru beam at 9-11 AMeV and a hydrogen target. Stored and cooled bare ions may pick up a proton in the ESR whenever they cross the hydrogen jet. The products of the 96Ru(p,γ) reaction were detected by two Double Sided Silicon Strip Detectors (DSSSD) mounted in a pocket on the inside of the ESR. Each detector had 16 strips in X- and Y- direction. The efficiency for (p,γ) events was close to 100%. As the experiment was performed at energies of 9-11 AMeV, competing (p,n) and (p,α) reactions occured too and could not be neglected. These events have to be discriminated from the desired proton capture reactions based on the position on the DSSSD. An additional background component is elastic scattering of ruthenium ions on protons. A Multi-Wire Proportional counter (MWPC) allowed the detection of electron-pick-up reaction, hence a determination of the luminosity based on this well known reaction.
Monte-Carlo simulations of the experiment were made using the Geant4 code. In these simulations, the experimental setup is described in detail and all reaction channels can be investigated. Based on the Geant4 simulations, a prediction of the shape of different spectral components can be performed. A comparison of simulated predictions with the experimental results shows a good agreement and allows the extraction of the cross section.
Primary author
Ms
Ganna Rastrepina
(GSI Helmholtzzentrum für Schwerionenforschung GmbH)
Co-authors
Dr
Aleksandra Kelic
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Dr
Bernhard Franzke
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Björn Riese
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Dr
C Rigollet
(Kernfysisch Versneller Instituut , Netherlands)
Dr
Carsten Brandau
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Christoph Langer
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Prof.
Christoph Scheidenberger
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Dr
Christophor Kozhuharov
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Dr
Danyal Winters
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Franz Käppeler
(Forschungszentrum Karlsruhe, Institut für Kernphysik, Karlsruhe, Germany)
Prof.
Fritz Bosch
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Dr
Fritz Nolden
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Dr
Gavin Lotay
(University of Edinburgh, Edinburgh, UK)
Prof.
Gottfried Münzenberg
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Dr
György Gyürky
(Institute of Nuclear Research of the Hungarian Academy of Sciences, Hungary)
Dr
Günter Weber
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
H Giessel
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Dr
Haik Simon
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Dr
Harald Bräuning
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Dr
Helmut Weick
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Iris Dillmann
(Technische Universität München, 85748 Garching, Germany)
Dr
Justyna Marganiec
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
K Beckert
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Dr
Kerstin Sonnabend
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Prof.
Klaus Blaum
(Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany)
Dr
Klaus Sümmerer
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Dr
Konstanze Boretzky
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Dr
Markus Steck
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Dr
Michael Heil
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Natalya Winters
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Nikos Petridis
(J.W. Goethe Universität, Frankfurt am Main, 60438, Germany)
Olga Ershova
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
P Beller
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Prof.
Philip Woods
(University of Edinburgh, Edinburgh, UK)
Qiping Zhong
(China Institute of Atomic Energy (CIAE) 102413 Beijing China)
Dr
Ralf Plag
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Prof.
Rene Reifarth
(J.W. Goethe Universität, Frankfurt am Main, 60438, Germany)
Prof.
Shawn Bishop
(Technische Universität München, 85748 Garching, Germany)
Tamás Szücs
(Institute of Nuclear Research of the Hungarian Academy of Sciences, Hungary)
Prof.
Thomas Aumann
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Prof.
Thomas Stöhlker
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Dr
Tom Davinson
(University of Edinburgh, Edinburgh, UK)
Tudi Le Bleis
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Ulrich Popp
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Dr
Yury Litvinov
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany)
Dr
Zsolt Fülöp
(Institute of Nuclear Research of the Hungarian Academy of Sciences, Hungary)
