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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:Laszlo Varga, Thomas Davinson, Jan Glorius, Beatrix Jurado, Christoph Langer, Claudia Lederer-Woods, Yuri A. Litvinov, Rene Reifarth, Zuzana Slavkovska, Thomas Stöhlker, Phil J. Woods, Yuan Ming Xing
Parent Title (English):Journal of Physics: Conference Series
Publisher:IOP
Place of publication:Bristol
Document Type:Article
Language:English
Year of Completion:2020
Date of the Publication (Server):2020/10/28
Volume:1668
Issue:Art 012046
Link:https://doi.org/10.1088/1742-6596/1668/1/012046
Zugriffsart:weltweit
Institutes:FH Aachen / Fachbereich Energietechnik
collections:Verlag / IOP
Open Access / Gold
Licence (German):License LogoCreative Commons - Namensnennung