Approaching the Gamow Window with Stored Ions: Direct Measurement of Xe-124(p,gamma) in the ESR Storage Ring

Glorius, J. and Langer, C. and Slavkovska, Z. and Bott, L. and Brandau, C. and Brueckner, B. and Blaum, K. and Chen, X. and Dababneh, S. and Davinson, T. and Erbacher, P. and Fiebiger, S. and Gassner, T. and Goebel, K. and Groothuis, M. and Gumberidze, A. and Gyurky, G. and Heil, M. and Hess, R. and Hensch, R. and Hillmann, P. and Hillenbrand, P. -M. and Hinrichs, O. and Jurado, B. and Kausch, T. and Khodaparast, A. and Kisselbach, T. and Klapper, N. and Kozhuharov, C. and Kurtulgil, D. and Lane, G. and Lederer-Woods, C. and Lestinsky, M. and Litvinov, S. and Litvinov, Yu. A. and Loeher, B. and Nolden, F. and Petridis, N. and Popp, U. and Rauscher, T. and Reed, M. and Reifarth, R. and Sanjari, M. S. and Savran, D. and Simon, H. and Spillmann, U. and Steck, M. and Stoehlker, T. and Stumm, J. and Surzhykov, A. and Szucs, T. and Nguyen, T. T. and Zadeh, A. Taremi and Thomas, B. and Torilov, S. Yu. and Tornqvist, H. and Traeger, M. and Trageser, C. and Trotsenko, S. and Varga, L. and Volknandt, M. and Weick, H. and Weigand, M. and Wolf, C. and Woods, P. J. and Xing, Y. M.. (2019) Approaching the Gamow Window with Stored Ions: Direct Measurement of Xe-124(p,gamma) in the ESR Storage Ring. PHYSICAL REVIEW LETTERS, 122 (9). ARTN092701.

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We report the first measurement of low-energy proton-capture cross sections of Xe-124 in a heavy-ion storage ring. Xe-124(54+) ions of five different beam energies between 5.5 and 8 AMeV were stored to collide with a windowless hydrogen target. The Cs-125 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 gamma 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.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Rauscher, Thomas
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:08 Oct 2019 09:35
Deposited On:08 Oct 2019 09:35

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