Inelastic collision cross section of excited molecules. IV. Rotational transitions for very high rotational quantum numbers and temperature effects in Na2(B1πu)

Abstract

For pt. III see ibid., vol.5, 2098-106 (1972). State selected rotationally inelastic collision processes have been studied in Na₂(B¹ pi _u) using laser induced fluorescence. As an extension of earlier measurements, the authors investigated levels with very high rotational quantum numbers: (v,J)=(0.152),(5,124) and (14,118). Collision partners are all rare gases. Asymmetries sigma ( delta J=+1)/ sigma ( delta J=-1) as large as 4.6 are found, evidence for very efficient dissociative collisions is reported and the temperature dependence of the asymmetry is shown for some levels with J<100 and Ne, Ar and Kr as collision partners.