Photoionization spectroscopy of NaAg

Two electronic systems of NaAg are observed with resonant photoionization spectroscopy, a weak one near 300 nm and a much stronger one at 330 nm. The 300 nm system correlates to the dipole-forbidden 3s–4s (2S←2S) transition of sodium and the stronger transitions converge to the 3s–3p (2P←2S) transition of sodium. Vibrational constants of three upper states and the ground state are reported. 39 bands are observed for the weak G←X transition originating from ν″ = 0–3 ground state vibrational levels. The ground state binding energy is greater than or equal to 1.59 eV and the vibrational frequency (ω″e) is 210 cm−1.