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.
|Number of pages||1|
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 7 Sep 2015|
|Event||XXIX International Conference on Photonic, Electronic, and Atomic Collisions - Toledo, Spain|
Duration: 22 Jul 2015 → 28 Jul 2015