Eight transitions in the Eu I-spectrum connecting the ground state with configuration 4f 7 6S 2 with states of the configuration 4f 7 6s 6p were studied with high resolution laseratomic-beam spectroscopy. CW dye lasers operating in the wavelength regions 435--470nm and 560-630nm were used for this study. New data for the hyperfine structure in lS3Eu were obtained as well as new and more accurate values for the isotope shifts between lSlEu and 153Eu. The existing data for the hyperfine structure in ~SlEu were reproduced with an exception for the level z~'P>2 .

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