Wallner, AntonBichler, MaxCoquard, L.Dillmann, IForstner, OGolser, RobinHeil, M.Käppeler, FranzKutschera, WalterLederer-Woods, C.Martschini, M.2020-03-302020-03-300556-2813http://hdl.handle.net/1885/202504The neutron capture cross section of ⁹Be for stellar energies was measured via the activation technique using the Karlsruhe Van de Graaff accelerator in combination with accelerator mass spectrometry at the Vienna Environmental Research Accelerator. To characterize the energy region of interest for astrophysical applications, activations were performed in a quasistellar neutron spectrum of kT = 25 keV and for a spectrum at En = 473 ± 53 keV. Despite the very small cross section, the method used provided the required sensitivity for obtaining fairly accurate results of 10.4 ± 0.6 and 8.4 ± 1.0 μb, respectively. With these data it was possible to constrain the cross section shape up to the first resonances at 622 and 812 keV, thus allowing for the determination of Maxwellian-averaged cross sections at thermal energies between kT = 5 and 100 keV. In addition, we report a new experimental cross section value at thermal energy of σth = 8.31 ± 0.52 mb.This work was partly funded by the Austrian Science Fund (FWF), Projects No. P20434 and No. I428, and by the Australian Research Council, Projects No. DP140100136 and No. DP180100496.11 pagesapplication/pdfen-AU© 2019 American Physical Society. A. Wallner, M. Bichler, L. Coquard, I. Dillmann, O. Forstner, R. Golser, M. Heil, F. Käppeler, W. Kutschera, C. Lederer-Woods, M. Martschini, A. Mengoni, S. Merchel, L. Michlmayr, A. Priller, P. Steier, and M. Wiescher, Stellar and thermal neutron capture cross section of ⁹Be, Phys. Rev. C 99, 015804 (2019) doi 10.1103/PhysRevC.99.015804https://creativecommons.org/licenses/by/4.0/Novae and supernovaeNuclear astrophysicsNuclear physics of explosive environmentsNuclear reactionsNucleosynthesis in explosive environmentsRadiative capture2019-01-1410.1103/PhysRevC.99.0158042020-07-06Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI