Grant Nos. PD/BD/114447/2016 and PD/BD/114452/2016. researcher position No. IF-FCT IF/00380/2014. Doctoral Training Programme (RaBBiT, PD/00193/2012). S.D. acknowledges support from FWF (P30332). Polish National Science Center (NCN) under the Grant No. UMO-2014/14/A/ST4/00405 (J. R.).; 5-trifluoromethanesulfonyl-uracil (OTfU), a recently proposed radiosensitizer, is decomposed in the gas-phase by attachment of ...