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We have investigated a fast formation channel yielding helium excited (bound) molecular states He₂* from heavy-body conversion of n=3 manifold He* atomic species, proposed by Frost et-al in 2001 (J.Phys.D, 34 1569). Optical emission spectroscopy has been employed to measure the time-dependent intensity of ∼20 atomic and molecular lines between λ=300-820nm from a short-pulse excited dielectric barrier discharge operating at 50-1000mbar. Correlations between atomic and molecular emission traces suggest that the singlet molecular state populations (D¹Σu⁺, E¹Πg, F¹Σu⁺) can be attributed to conversion of the atomic He*(3¹S) state whilst the triplet molecular states are derived from the He*(33S) state.1 page(s

journal of physics. conference series

A time-resolved spectroscopic study of UV/visible emissions from the He*/He*2(n=3) manifold states: formation channels for fast He*2production