Spectroscopy of Na2 Using Laser‐Induced Fluorescence

摘要: The argon‐ion laser lines at 4658, 4727, 4765, 4880, 4965, 5017, and 5145 A are each found to excite one or more resonance fluorescence series of the Na2 (X 1Σg+ − B 1Πu) blue‐green band system. Altogether, 19 different progressions have been identified assigned υ, J quantum numbers. absolute wavenumbers many these emission measured interferometrically using a Fabry–Perot etalon crossed with Bass–Kessler type spectrograph. revised set spectroscopic constants has determined for both upper lower states which reproduce observed term energies better than 0.1 cm−1 on average. Using improved data, potential curves constructed B X by Rydberg–Klein–Rees method. These used in turn compute Franck–Condon factors B–X