Alkyl and alkyl peroxy radicals from t-butyl alcohol (TBA), HOC(CH₃)₂CH₂^{{radical dot}} and HOC(CH₃)₂CH₂O₂^{{radical dot}} have been studied in the gas phase at 298 K. Two techniques were used: pulse radiolysis UV absorption to measure the spectra and kinetics, and long path-length Fourier transform infrared spectroscopy (FTIR) to identify and quantify the reaction products. Absorption cross sections were quantified over the wavelength range 220-320 nm. At 240 nm, σ_HOC(CH3)2CH2=(2.4 ±0.3)×10^-18 and σ_{HOC(CH3)2CH2O2} =(3.4±0.5)×10^-18 cm² molecule^-1 have been obtained. Observed rate constants for the self-reaction of HOC(CH₃)₂CH₂^{{radical dot}} and HOC(CH₃)₂CH₂O₂^{{radical dot}} radicals were found to be (3.0±0.5)×10^-11 and (7.8±1.5)×10^-12 cm³ molecule^-1 s^-1, respectively. For the reaction of the alkyl radical with O₂ in 1 atm SF₆ a rate constant of (1.8±0.2)×10^-12 cm³ molecule^-1 s^-1 was found. k(HOC(CH₃)₂CH₂O₂^{{radica l dot}}+NO) and k(HOC(CH₃)₂CH₂O₂^{{radica l dot}}+NO₂) were determined to be (4.9±0.9)×10^-12 and (6.7±0.9)×10^-12 cm³ molecule ^-1 s^-1, respectively. In the FTIR experiments products were studied using chlorine-initiated oxidation in TBA/N₂/Cl₂ and TBA/N₂/O₂/Cl₂ mixtures.