⁵⁶Fe capture cross section experiments at the RPI LINAC Center

Abstract

Abstract.A new array of C 6 D 6 detectors installed at the RPI LINAC Center has enabled the capability to measure neutron capture cross sections above the 847 keV inelastic scattering threshold of 56 Fe through the use of digital post-processing filters and pulse-integral discriminators, without sacrificing the statistical quality of data at lower incident neutron energies where such filtering is unnecessary. The C 6 D 6 detectors were used to perform time-of-flight capture cross section measurements on a sample 99.87% enriched iron-56. The totalenergy method, combined with the pulse height weighting technique, were then applied to the raw data to determine the energy-dependent capture yield. Above the inelastic threshold, the data were analyzed with a pulse-integral filter to reveal the capture signal, extending the the full data set to 2 MeV.

The CIELO collaboration: Progress in international evaluations of neutron reactions on Oxygen, Iron, Uranium and Plutonium

“…Leal's IRSN-v2 resolved resonance analysis was adopted up to the first inelastic scattering level (850 keV). This analysis included the use of new RPI data [19]. As in previous evaluations, "background" modifications to the cross sections above 500 keV were added by Trkov, to account for hypothesized missing p-and d-wave resonances and to avoid an unphysically-low neutron capture cross section.…”

Ta181(n,γ) cross section and average resonance parameter measurements in the unresolved resonance region from 24 to 1180 keV using a filtered-beam technique

“…• back angle with respect to the neutron beam to remove any potential biases due to anisotropies in the capture cascade [6,13]. The full setup is pictured in Fig.…”