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

R. J. Carman; D. M. Kane

doi:10.1088/1742-6596/635/3/032079

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

R. J. Carman, D. M. Kane

MQ Photonics Research Centre

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Abstract

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 (D¹Σ_u⁺, E¹Π_g, F¹Σ_u⁺) can be attributed to conversion of the atomic He^∗(3¹S) state whilst the triplet molecular states are derived from the He^∗(3³S) state.

Original language	English
Article number	032079
Pages (from-to)	1-1
Number of pages	1
Journal	Journal of Physics: Conference Series
Volume	635
DOIs	https://doi.org/10.1088/1742-6596/635/3/032079
Publication status	Published - 7 Sept 2015
Event	XXIX International Conference on Photonic, Electronic, and Atomic Collisions - Toledo, Spain Duration: 22 Jul 2015 → 28 Jul 2015

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abstract = "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.",

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AU - Kane, D. M.

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AB - 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.

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

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