[en] The radioactive Ba isotopes are produced in the interaction of 60 MeV/u ¹⁸O with ²³²Th. Ba is separated from thorium and complex reaction product mixture by BaCl₂ precipitation and purified. ¹³³Ba is used as the tracer to determine chemical yield of Ba. The Ba fraction is measured by off-line gamma-ray spectroscopy. The formation cross-sections of the individual Ba isotope is calculated from the intensities of gamma-ray peaks of each Ba isotope as well as relative nuclear data. The results show the n-deficient Ba isotopes still have higher formation cross-sections under the conditions of intermediate energy projectile and thick targets