First collinear laser spectroscopy measurements of radioisotopes from an IGISOL ion source

The standard Doppler-free technique of collinear laser spectroscopy has been successfully applied to radioisotopes from the ion-guide isotope separator (IGISOL) at the University of Jyvaeskylae. The laser resonance fluorescence signals for the 140,142,144Ba radioisotopes show that the ion beam energy spread is less than 6 eV, allowing the laser technique to have both high resolution and a sensitivity comparable with the best obtained at conventional facilities. (orig.)