UV Laser Spectroscopy Using the Velocity-Modulation Technique: New Hot Bands of the B2Σ+u–X2Σ+g System of N+2

摘要: Abstract The laser absorption spectroscopy of molecular ions using the velocity-modulation technique has been employed in UV region. source was a cw single-mode beam from an extra-cavity frequency doubling unit associated with dye laser. high-resolution spectrum First Negative system B 2 Σ + u – X g N studied. were produced electric discharge flowing gas mixture He/N . Seven vibrational bands Δ v = sequence ( ′ 2–8) have observed region between 30 000 and 30 600 cm −1 , five them for first time at high resolution 2–4, 6, 7). A set 770 lines assigned; among are several extra belonging to Π system. standard model used consider perturbations rovibrational levels states. An improved deperturbed constants effective interaction parameters derived 3– 14 7– 20 complexes.