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Energy levels, normal and specific mass shift parameters as well aselectronic densities at the nucleus are reported for numerous states along theberyllium, boron, carbon, and nitrogen isoelectronic sequences. Combined withnuclear data, these electronic parameters can be used to determine values oflevel and transition isotope shifts. The calculation of the electronicparameters is done using first-order perturbation theory with relativisticconfiguration interaction wave functions that account for valence, core-valenceand core-core correlation effects as zero-order functions. Results are comparedwith experimental and other theoretical values, when available.

Isotope Shifts in Beryllium-, Boron-, Carbon-, and Nitrogen-like Ions from Relativistic Configuration Interaction Calculations