TY - JOUR A1 - Glorius, Jan A1 - Langer, Christoph A1 - Slavkovská, Zuzana A1 - Bott, Lukas A1 - Brandau, Carsten A1 - Brückner, Benjamin A1 - Blaum, Klaus A1 - Chen, Xiangchen A1 - Dababneh, Saed A1 - Davinson, Thomas A1 - Erbacher, Philipp A1 - Fiebiger, Stefan A1 - Gaßner, Tobias A1 - Göbel, Kathrin A1 - Groothuis, Mathias A1 - Gumberidze, Alexandre A1 - Gyürky, György A1 - Heil, Michael A1 - Heß, Regina A1 - Hensch, Roman A1 - Hillmann, Paula A1 - Hillenbrand, Pierre-Michel A1 - Hinrichs, Ole Djürko A1 - Jurado Apruzzese, Beatriz A1 - Kausch, Tanja A1 - Khodaparast, Anahita A1 - Kisselbach, Timo A1 - Klapper, Nadine A1 - Kozhuharov, Christophor A1 - Kurtulgil, Cem Deniz A1 - Lane, Gregory J. A1 - Lederer-Woods, Claudia A1 - Lestinsky, Michael A1 - Litvinov, Sergey A. A1 - Litvinov, Yuri A. A1 - Löher, Bastian A1 - Nolden, Fritz A1 - Petridis, Nikolaos A1 - Popp, Ulrich A1 - Rauscher, Thomas A1 - Reed, Matthew A1 - Reifarth, René A1 - Sanjari, Mohammad Shahab A1 - Savran, Deniz A1 - Simon, Haik A1 - Spillmann, Uwe A1 - Steck, Markus A1 - Stöhlker, Thomas A1 - Stumm, Julia A1 - Surzhykov, Andrey A1 - Szücs, Tamas A1 - Nguyen, Thien Tam A1 - Taremi Zadeh, Ashkan A1 - Thomas, Benedikt A1 - Torilov, Sergey Yu. A1 - Törnqvist, Hans Toshihide A1 - Träger, Michael A1 - Trageser, Christian A1 - Trotsenko, Sergiy A1 - Varga, László A1 - Volknandt, Meiko A1 - Weick, Helmut A1 - Weigand, Mario A1 - Wolf, Clemens A1 - Woods, Philip John A1 - Xing, Yuan Ming T1 - Approaching the Gamow window with stored ions: Direct measurement ¹²⁴Xe(p, γ) in the ESR storage ring T2 - Physical review letters N2 - We report the first measurement of low-energy proton-capture cross sections of 124Xe in a heavy-ion storage ring. 124Xe54+ ions of five different beam energies between 5.5 and 8 AMeV were stored to collide with a windowless hydrogen target. The 125Cs reaction products were directly detected. The interaction energies are located on the high energy tail of the Gamow window for hot, explosive scenarios such as supernovae and x-ray binaries. The results serve as an important test of predicted astrophysical reaction rates in this mass range. Good agreement in the prediction of the astrophysically important proton width at low energy is found, with only a 30% difference between measurement and theory. Larger deviations are found above the neutron emission threshold, where also neutron and γ widths significantly impact the cross sections. The newly established experimental method is a very powerful tool to investigate nuclear reactions on rare ion beams at low center-of-mass energies. KW - Nuclear astrophysics KW - Nuclear physics of explosive environments KW - Nuclear reactions KW - Radiative capture Y1 - 2019 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/62284 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-622841 SN - 1079-7114 N1 - This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement No. 682841 “ASTRUm”). This work is supported by the Helmholtz International Center for FAIR (HIC for FAIR), by the Bundesministerium für Bildung und Forschung (BMBF) (05P15RFFAA, 05P15RGFAA), by the Science and Technology Facilities Council (STFC) UK (ST/L005824/1, ST/M001652/1, ST/M006085), by the Helmholtz-CAS Joint Research Group (HCJRG-108), and by the Helmholtz-OCPC Postdoctoral Program (GSI08). C. L. W. acknowledges support by the European Research Council (Grant Agreement ERC-2015-StG No. 677497 “DoRES”). S. D. gratefully acknowledges the support provided by the Alexander von Humboldt Foundation and the Jordanian Scientific Research Support Fund under Grant No. Bas/2/4/2014. S. Yu. T. acknowledges the support by the DAAD through Mendeleev Grant, SPbU(28999675). C. L. and J. G. thank the ExtreMe Matter Institute EMMI at GSI, Darmstadt, and JINA-CEE (NSF Grant No. PHY-1430152) for support in the framework of the EMMI/JINA-CEE Workshop “NARRS” during which this work was discussed. VL - 122 IS - art. 092701 SP - 1 EP - 6 PB - APS CY - College Park, Md. ER -