$^{197}\mathrm{Au}$($n,\ensuremath{\gamma}$) cross section in the unresolved resonance region

${}^{197}{Au}$ ( $n, γ$ ) cross section in the unresolved resonance region

C. Lederer et al. (n_TOF Collaboration)

Phys. Rev. C 83, 034608 – Published 17 March 2011

Abstract

The cross section of the reaction ${}^{197}{Au}$ ( $n, γ$ ) was measured with the time-of-flight technique at the n_TOF (neutron time-of-flight) facility in the unresolved resonance region between 5 and 400 keV using a pair of $C_{6}$ D $_{6}$ (where D denotes ${}^{2}H$ ) liquid scintillators for the detection of prompt capture $γ$ rays. The results with a total uncertainty of $3.9 % - 6.7$ $%$ for a resolution of 20 bins per energy decade show fair agreement with the Evaluated Nuclear Data File Version B-VII.0 (ENDF/B-VII.0), which contains the standard evaluation. The Maxwellian-averaged cross section (MACS) at 30 keV is in excellent agreement with the one according to the ENDF/B-VII.0 evaluation and 4.7 $%$ higher than the MACS measured independently by activation technique. Structures in the cross section, which had also been reported earlier, have been interpreted as being due to clusters of resonances.