Measurement of the 16O(n, α)13C cross-section using a Double Frisch Grid Ionization Chamber
1 Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstraße 400, 01328 Dresden, Germany
2 Technische Universität Dresden (TUD), 01062 Dresden, Germany
3 European Organization for Nuclear Research (CERN), Route de Meyrin 1211, Genéve, Switzerland
4 National Technical University of Athens (NTUA), Zografou Campus 9, Iroon Polytechniou Str, 15780 Zografou, Greece
5 Onco Ray - National Center of for Radiation Research in Oncology, Händelallee 26, 01309 Dresden, Germany
6 Institute de Physique Nucleaire (IPN), rue Georges Clemenceau, 9406 Orsay, France
* e-mail: email@example.com
Published online: 30 September 2020
The 16O(n, α)13C reaction was proposed to be measured at the neutron time-of-flight (n_TOF) facility of CERN. To this purpose, a Double Frisch Grid Ionization Chamber (DFGIC) containing the oxygen atoms as a component in the counting gas coupled with a switch device in order to prevent the charge collection from the so-called γ-flash has been developed at Helmholtz-Zentrum Dresden-Rossendorf (HZDR), in Germany. The first 16O(n, α)13C measurement without seeing the charge of the γ-flash at n_TOF has been performed in November 2018. After the electronics did not suffer from the y-flash any more, another huge charge collection was discovered. Due to the high instantaneous flux at the n_TOF facility  the amount of that induced charge from neutron induced background reactions was piling up so much that the recognition of 16O(n, α)13C reactions from that background was very difficult. For that reason another 16O(n, α)13C measurement at the time-of-flight facility nELBE at HZDR which has a low instantaneous flux , has been performed in April 2019. Both measurements from n_TOF and nELBE will be presented here.
© The Authors, published by EDP Sciences, 2020
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