Silicon has become an unavoidable element in the circuitry central to everyday life. In turn, the interactions of silicon isotopes with neutrons for nuclear physics applications, among other motivations, have become increasingly important to understand. The dominant isotope of silicon, ${}^{28}\mathrm{Si}$, is thus of primary interest for enhanced understanding for neutron transport calculations and related investigations. Unfortunately, the existing measurement database for neutron scattering reactions on ${}^{28}\mathrm{Si}$ is minimal, and nuclear data evaluations on this topic have not been updated for decades. This article details new measurements of the ${}^{28}\mathrm{Si}(n,n^{\prime }\gamma )$ reaction utilizing multiple analysis methods available within the correlated gamma neutron array for scattering (CoGNAC). Specifically, high-precision near-threshold results and high-incident-energy results were obtained using the $\gamma$-only and correlated $n\text{−}\gamma$ techniques. First-ever measurements of the correlated $n\text{−}\gamma$ angular distribution for particles emitted following population of the first excited state in ${}^{28}\mathrm{Si}$ were obtained as well, which provide unique insight into theoretical descriptions of the inelastic neutron scattering reaction mechanism itself and detailed guidance for nuclear reaction models. The results agree well with literature data where they exist, and substantially expand on the current database for neutron reactions on ${}^{28}\mathrm{Si}$.

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• Direct reactions
• Inelastic scattering reactions
• Neutron physics
• Nuclear reactions
• 20 ≤ A ≤ 38
• Nuclear data analysis & compilation
• Particle sources & targets
• Radiation detectors
• Spectrometers & spectroscopic techniques