Laser spectroscopy of metastable palladium at 340 and 363 nm

Palladium has 6 stable isotopes. (A = 102, 104,105,106,108, and 110). We performed isotope shift measurements of the $4d^9 5s \, ^3D_3 \to 4d^9 5p \, ^3F_4 $ transition at 340 nm, and the $4d^9 5s \, ^3D_3 \to 4d^9 5p \, ^3P_4 $ transition at 363 nm. The measurements were performed using saturation absorption spectroscopy at the $\sim 1$ MHz level. In addition we also determined the hyperfine structure constants of Palladium-105 (I=5/2), the only isotope with non-zero spin, for the states involved in the two transitions. These measurements will serve as a benchmark for upcoming laser spectroscopic investigations of neutron rich palladium isotopes as a probe of their nuclear structure.