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In this work, we report an experimental investigation into the interaction of vacuum-ultraviolet radiation with tetrahydrofuran molecules in the gas phase. More specifically, absolute photoabsorption cross sections and photoionization quantum yields are measured and reported in the (11.11–21.45) eV energy range. In addition, photoionization and neutral-decay cross sections in absolute scale are derived and reported. The measurements were performed using the double-ion-chamber technique. The comparison between our measured data and the existing experimental results is encouraging.