Towards background-free studies of capture reaction in a heavy-ion storage ring

  • Stored and cooled, highly-charged ions offer unprecedented capabilities for precision studies in the realm of atomic, nuclear structure and astrophysics[1]. After the successful investigation of the 96Ru(p,7)97Rh reaction cross section in 2009[2], the first measurement of the 124Xe(p,7)125Cs reaction cross section has been performed with decelerated, fully-ionized 124Xe ions in 2016 at the Experimental Storage Ring (ESR) of GSI[3]. Using a Double Sided Silicon Strip Detector, introduced directly into the ultra-high vacuum environment of a storage ring, the 125Cs proton-capture products have been successfully detected. The cross section has been measured at 5 different energies between 5.5AMeV and 8AMeV, on the high energy tail of the Gamow-window for hot, explosive scenarios such as supernovae and X-ray binaries. The elastic scattering on the H2 gas jet target is the major source of background to count the (p,7) events. Monte Carlo simulations show that an additional slit system in the ESR in combination with the energy information of the Si detector will enable background free measurements of the proton-capture products. The corresponding hardware is being prepared and will increase the sensitivity of the method tremendously.

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Author:László VargaGND, Thomas DavinsonORCiD, Jan GloriusORCiDGND, Beatriz Jurado ApruzzeseORCiD, Christoph LangerGND, Claudia Lederer-Woods, Yuri A. LitvinovORCiDGND, René ReifarthORCiDGND, Zuzana SlavkovskáORCiDGND, Thomas StöhlkerORCiDGND, Philip John Woods, Yuan Ming Xing
Parent Title (English):Journal of physics. Conference Series
Publisher:IOP Publ.
Place of publication:Bristol
Document Type:Article
Date of Publication (online):2020/10/01
Date of first Publication:2020/10/01
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Contributing Corporation:Nuclear Physics in Astrophysics IX (NPA-IX), 15-20 September 2019, Frankfurt am Main
Release Date:2022/11/07
Issue:art. 012046
Article Number:012046
Page Number:4
First Page:1
Last Page:4
This project has received funding from the European Research Council (ERC) under the European Unions Horizon 2020 research and innovation programme (grant agreement No 682841 ASTRUm). This work is supported by the Helmholtz International Center for FAIR (HIC and FAIR), by the Bundesministerium für Bildung and Forschung (BMBF) (05P15RFFAA), by the Science and Technology Facilities Council (STFC) UK(ST/L005824/1, ST/M001652/1, ST/M00608), and by the Helmholtz-OCPC Postdoctoral Program 2017 (GSI08). CLW acknowledges support by the European Research Council (grant agreement ERC-2015-StG Nr. 677497 DoRES).
Institutes:Physik / Physik
Forschungscluster / ELEMENTS
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoCreative Commons - Namensnennung 3.0