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One important goal of the ILIMA project at FAIR is the study of masses and decay properties of relativistic isomeric beams stored and cooled in the planned storage-ring complex. A new scheme is described, where a storage-cooler ring is used for high-resolution mass separation. Experimental results on the separation of the isobaric pair 140 Pr-140 Ce are presented.

Masses of neutron-rich nuclei ranging from ytterbium to uranium were investigated using the Schottky Mass Spectrometry (SMS) method. Special efforts were devoted to exploring long-lived K -ismoers in the mass 180-region. New ground state masses, new isotopes and isomers are also identified in the sub-uranium region and 208 Pb region. Some preliminary results from this experiment are presented.

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