Results on $^{235}$U(n$_{\mathrm{th}}$,f) isotopic fission yields using prompt and delayed gamma rays at the FIPPS spectrometer of the ILL

We present preliminary results from a measurement campaign conducted with the FIPPS $γ$-ray spectrometer at the ILL using an active target made of $^{235}$U dissolved in a liquid scintillator. Prompt $γ$ rays were used to extract absolute, independent isotopic fission yields. We obtained yields for