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Sewraj, Neermalsing; Gardou, Jean-Pierre; Salamero, Y.; Millet, P.

doi:10.1103/physreva.62.052721

Cited by 16 publications

(30 citation statements)

References 73 publications

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“…Three-body rate constants relative to the formation of excimers and radiative lifetime of Xe 2 A1 u 3=2 ½ 2 ÀÁ lowv are consistent with those reported in the literature [26][27][28] and are more accurate.…”

Section: Example Of Results From Analyses Of Vuv Emissions Of Xenon Esupporting

confidence: 77%

“…Atoms excited in a resonant state will decay to the ground level by emission of resonant photons themselves having a good probability of being absorbed by surrounding ground-state atoms and then reemitted. Imprisonment of resonance radiation or radiative trapping is caused by multiple emission, absorption and re-emission of photons before they leave the cell [28,40].…”

Section: Radiation Trapping In Rare Gasesmentioning

confidence: 99%

See 1 more Smart Citation

Study of Formation and Decay of Rare-Gas Excimers by Laser- Induced Fluorescence

Marchal¹,

Sewraj²,

Gardou³

et al. 2018

Photon Counting - Fundamentals and Applications

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The aim of this chapter is to review the experimental and numerical techniques for the estimation of the laser-induced fluorescence (LIF) decay in rare gases using timecorrelated single-photon counting. The advantages of single-photon counting technique are discussed by means of measurement uncertainty analysis. In addition, this chapter provides information concerning the application of this technique to filamentary dielectric barrier discharges (DBD) and radiation trapping of the resonant transitions.

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Section: Example Of Results From Analyses Of Vuv Emissions Of Xenon Esupporting

confidence: 77%

Section: Radiation Trapping In Rare Gasesmentioning

confidence: 99%

Study of Formation and Decay of Rare-Gas Excimers by Laser- Induced Fluorescence

Marchal¹,

Sewraj²,

Gardou³

et al. 2018

Photon Counting - Fundamentals and Applications

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“…The amplitude of the exponential term D 2 /τ m2 may be equal to zero: either k r1 = 0 or A 10 = 0. If k r1 = 0, then populating Ar( 3 P 2 ) via Ar 2 (0 + u ) is negligible, in contradiction with the observation in the selective excitation experiments performed by Moutard et al [61] in the same gas and by ourselves in heavier rare gases [28]. A second explanation lies in a negligible density of resonant states (A 10 ) after t 0 .…”

Section: Analysis Of the Luminescence Decay (T > Tmentioning

confidence: 72%

“…Our research group has been dealing with the study of the formation of rare gas excimers, in which excitation was first achieved using alpha particles [24,25] and then by using selective multi-photonic absorption to populate the lowest excited states [26][27][28]. The present work, which is an extension of these previous ones, is a study of the formation and decay rates of excimers under the usual operating conditions of VUV and UV sources.…”

Section: Introductionmentioning

confidence: 96%

Luminescence of argon in a spatially stabilized mono-filamentary dielectric barrier micro-discharge: spectroscopic and kinetic analysis

Merbahi¹,

Sewraj²,

Marchal³

et al. 2004

J. Phys. D: Appl. Phys.

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The experimental work reported here is devoted to the temporal behaviour of a mono-filamentary dielectric barrier discharge in pure argon, from 100 to 700 Torr. A sinusoidal voltage supply is used, its frequency ranging from 10 to 90 kHz. An anode avalanche followed by a cathode streamer as well as the spatial stability of the micro-discharge is clearly seen in successive 3-ns snapshots in the visible range. Near the cathode, its diameter is about 0.2 mm, at 400 Torr. The electrical characteristics of the discharge are also evaluated, in particular the breakdown voltage and the energy deposited in the micro-discharge. The light output in the vacuum ultraviolet range is essentially due to the second continuum of argon, centred at 130 nm. The kinetic study of this continuum shows that primary excitation of the lowest argon atomic 4s and 4s′ states is practically achieved after 120 ns since beyond that time the luminescence decay of the second continuum is fairly described by only two exponential terms. So collisions between excited states, electronic collisions, and recombination of ionic species do not contribute significantly to this luminescence, after 120 ns. Surprisingly, we do not observe the contribution of the Ar(3P1) resonant state in the production of the argon excimers. The radiative lifetime of the Ar2[1u(3P2)]low v excimer ((3.18 ± 0.03) µs) and the three-body rate constant relative to the decay of the Ar(3P2) metastable state ((13.2 ± 0.9) Torr−2 s−1) leading to the formation of Ar2[1u(3P2)], are estimated. These results are consistent with those found from the literature. A simple kinetic scheme is proposed for times later than 120 ns.

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“…At room temperature, all the determinations of α 32 found in the literature are around 8 × 10 −32 cm 6 s −1 [14,17,20,22,24,35]. For temperatures lower than 273 K, only one value was measured by these authors at 190 K and this temperature corresponds to the upper relative variation of the rate constant.…”

Section: Discussionmentioning

confidence: 88%

Temperature dependence of xenon excimer formations using two-photon absorption laser-induced fluorescence

Marchal¹,

Sewraj²,

Jabbour³

et al. 2010

J. Phys. B: At. Mol. Opt. Phys.

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Abstract. The temporal dependence of VUV emissions of the first continuum of xenon at around 150 nm are investigated for pressures ranging from 10 to 100 Torr and for temperatures ranging from 200 to 300 K, after briefly and selectively populating exclusively the resonant or the metastable atomic states of the 5p 5 6s configuration. A kinetic and spectroscopic study was performed by analyzing the VUV post luminescence decay of xenon operating with such excitation conditions. Our results clearly show the temperature effects on the rate constants α 31 and α 32 of formation of excimers correlated respectively to the first resonant and the first metastable states by three-body collisions. The resulting reaction rates are obtained as a function of temperature T : α 31 = 3.90 × 10 −27 T −1.78 cm −6 s −1 , α 32 = 1.34 × 10 −27 T −1.70 cm −6 s −1 . For the whole pressure range, low temperatures favour the formation of xenon excimers and the efficiency of the three-body collisions in forming stabilized excimers increases with decreasing temperature

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Radiation trapping of the3P1−1S0<

Cited by 16 publications

References 73 publications

Study of Formation and Decay of Rare-Gas Excimers by Laser- Induced Fluorescence

Study of Formation and Decay of Rare-Gas Excimers by Laser- Induced Fluorescence

Luminescence of argon in a spatially stabilized mono-filamentary dielectric barrier micro-discharge: spectroscopic and kinetic analysis

Temperature dependence of xenon excimer formations using two-photon absorption laser-induced fluorescence

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