Na2(A 1Σ+u→X 1Σ+g) fluorescence accompanied by a continuous spectrum

Abstract

A suitably adjusted single‐mode line of the krypton ion laser at 5682 Å has been found to excite Na₂ to the single level A ¹Σ⁺_u(v′ = 34, J′ = 50). Then, a series of resonance fluorescence to different vibrational levels of the ground state X ¹Σ⁺_g have been observed up to the point of convergence. A continuous spectrum with banded diffraction structure has been contiguous to it and extended toward the small wave number region. The spectrum has been quantitatively accounted for by quantal calculations.