Hyperfine structures in ^91Zr by saturation optogalvanic spectroscopy

We report high-resolution Doppler-free hyperfine-structure determinations of eight excited levels in the first spectrum of zirconium. These structures have been obtained with optogalvanic intermodulated saturation and Polinex spectroscopic techniques on a zirconium vapor formed in a hollow-cathode-type generator. Quantitative values for the hyperfine splittings and for the A and B constants are given for the levels at 16297cm−1(F32°), 16787cm−1(F51°), 16844cm−1(F33°), 17430cm−1(D31°), 17556cm−1(F34°), 17814cm−1(D32°), 18244cm−1(D33°) of the configuration 4d25s5pz and of the level at 15 120 cm−1 of the configuration 4d35sa3H6.