Isotope shifts in the 4416-Å cadmium laser

Isotope shifts in Cd
¹¹²
, Cd
¹¹⁴
, and Cd
¹¹⁶
have been measured using enriched isotopes in a cadmium laser. Preparatory measurements using natural cadmium showed an anomalous change from a double-peaked spectral profile to a single-peaked profile when the active tube length was doubled.