Abstract. 2;-hyperonic X-ray lines have been observed in 8 elements and their intensities as well as those of the accompaning kaonic X-ray lines have been determined. The 2;-atomic cascade has been found to be similar to those of other exotic atoms. The production of S-hyperons per stopped K-has been measured by comparing their X-ray intensities. For the first time the intensity attenuation due to the strong absorptive 2;N interaction could be measured in four cases, and simple optical model calculations have been performed in order to reproduce the data.