Abstract
A set of neutron transmission and capture experiments based on the Time Of Flight (TOF) technique, were performed in order to determine the 241 Am capture cross section in the energy range from 0.01 eV to 1 keV. The GELINA facility of the Institute for Reference Materials and Measurements (IRMM) served as the neutron source. A pair of C6D6 liquid scintillators was used to register the prompt gamma rays emerging from the americium sample, while a Li-glass detector was used in the transmission setup. Results from the capture and transmission data acquired are consistent with each other, but appear to be inconsistent with the evaluated data files. Resonance parameters have been derived for the data up to the energy of 100 eV.
Highlights
New reactor designs created a need for accurate cross sections for neutron induced reactions for the major and minor actinides [1]
A set of neutron transmission and capture experiments based on the Time Of Flight (TOF) technique, were performed in order to determine the 241Am capture cross section in the energy range from 0.01 eV to 1 keV
Resonance parameters have been derived for the data up to the energy of 100 eV
Summary
New reactor designs created a need for accurate cross sections for neutron induced reactions for the major and minor actinides [1]. Deep geological isolation is not a favorable solution and a more sophisticated approach should be followed with incineration and/or transmutation being considered as viable options. The latest measurement by Jandel et al [2] reported resonance parameters with total width smaller by a few percent. The ratio between the neutron widths reported by Jandel et al and [7], [8] and [11], as depicted, shows an energy dependence. Another set of independent experiments would be desirable for a reliable new evaluation
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