Abstract
The neutron capture cross section of 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 keV and for a spectrum at keV. Despite the very small cross section, the method used provided the required sensitivity for obtaining fairly accurate results of and , 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 and 100 keV. In addition, we report a new experimental cross section value at thermal energy of mb.
2 More- Received 21 August 2018
- Revised 22 October 2018
- Corrected 30 May 2019
DOI:https://doi.org/10.1103/PhysRevC.99.015804
Published 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.
Published by the American Physical Society