Coulomb dissociation of 16O into 4He and 12C
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Abstract
We measured the Coulomb dissociation of 16O into 4He and 12C within the FAIR Phase-0 program at GSI Helmholtzzentrum für Schwerionenforschung Darmstadt, Germany. From this we will extract the photon dissociation cross section 16O(α,γ)12C, which is the time reversed reaction to 12C(α,γ)16O. With this indirect method, we aim to improve on the accuracy of the experimental data at lower energies than measured so far.
The expected low cross section for the Coulomb dissociation reaction and close magnetic rigidity of beam and fragments demand a high precision measurement. Hence, new detector systems were built and radical changes to the R3B setup were necessary to cope with the high-intensity 16O beam. All tracking detectors were designed to let the unreacted 16O ions pass, while detecting the 12C and 4He.
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Bott, L. T., Göbel, K., Heil, M., Kelić-Heil, A., Reifarth, R., Aliotta, M., Almusidi, T., Alvarez-Pol, H., Atar, L., Atkins, L., Aumann, T., Bemmerer, D., Benlliure, J., Bertulani, C., Boretzky, K., Brückner, B., Brandenburg, L., Bruni, G., Cabanelas Eiras, P., … Zanetti, L. (2023). Coulomb dissociation of 16O into 4He and 12C. In S. Freeman, C. Lederer-Woods, A. Manna, & A. Mengoni (Eds.), EPJ Web of Conferences (Vol. 279, p. 04003). EDP Sciences. https://doi.org/10.1051/epjconf/202327904003
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