The Electron‐Excited Mid‐Ultraviolet to Near‐Infrared Spectrum of H<sub>2</sub>: Cross Sections and Transition Probabilities

Aguilar, Alejandro; Ajello, J. M.; Mangina, Rao S.; James, G. K.; Abgrall, H.; Roueff, E.

doi:10.1086/587690

Cited by 21 publications

(19 citation statements)

References 62 publications

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“…The OES of the plasma with treated DNPs was performed as well. Only the structures belonging to hydrogen molecular bands and atomic lines were observed with traces of nitrogen molecular bands and oxygen atomic lines as a processing gas impurity. No OH radical bands were observed in the plasma during the DNPs treatment.…”

Section: Resultsmentioning

confidence: 99%

Low-Temperature hydrogenation of diamond nanoparticles using diffuse coplanar surface barrier discharge at atmospheric pressure

Kromka

Čech

Kozak

et al. 2015

Phys. Status Solidi B

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Due to an extraordinary combination of intrinsic properties of diamond nanoparticles (DNPs), there is an increased demand for their usage in various areas. While a broad range of surface termination is often done by wet‐chemical, UV‐irradiation or plasma treatments, DNPs hydrogenation is still an open issue. Thermal annealing or microwave plasma treatment, both known as high‐temperature processes, do not offer satisfactory solutions for DNPs hydrogenation. Here, we report on a new approach for plasma‐assisted DNPs hydrogenation at temperatures below 100 °C. As‐received detonation DNPs with size about 5 nm were annealed (oxidized) in air at 450 °C for 30 min to reduce non‐diamond carbon content. Then the annealed DNPs were plasma treated using atmospheric‐pressure diffuse coplanar surface barrier discharge in pure hydrogen at powers densities of 1.8 and 3.1 W/cm2. While infrared spectra of annealed DNPs were dominated by oxygen containing functional groups, plasma‐hydrogenated DNPs revealed increase of bands of CH stretching vibrations in the region of 2800–3000 cm−1 with only 5 min of plasma treatment. Prolonged plasma treatments up to 60 min resulted in the increase of CH stretching vibrations and a decrease of COC groups in the spectral region of 1000–1300 cm−1.

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Section: Resultsmentioning

confidence: 99%

Low-Temperature hydrogenation of diamond nanoparticles using diffuse coplanar surface barrier discharge at atmospheric pressure

Kromka

Čech

Kozak

et al. 2015

Phys. Status Solidi B

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“…When no absorption is observed, the CR of the emergent emission is 1.1 (Gustin et al, 2013, and references therein). H Lyman-↵ is produced by de-excitation from the n = 2 to the fundamental n = 1 electronic level of H atoms, while the visible Balmer series is due to the de-excitation from n > 2 to the n = 2 level of H (Aguilar et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Simultaneous multi-scale and multi-instrument observations of Saturn’s aurorae during the 2013 observing campaign

Melin

Stallard

Cowley

et al. 2016

Icarus

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On 21 April 2013, during a co-ordinated Saturn auroral observing campaign, the northern and southern poles of the planet were observed from the NASA Infrared Telescope Facility (IRTF), Keck, and Hubble Space Telescope (HST) simultaneously with the Cassini infrared, visible, and ultraviolet remote sensing instruments. We present simultaneous multi-scale and mutli-wavelength analysis of the morphology of auroral emissions at Saturn. There is variability on every spatial and temporal scale analysed, and high spatial resolution observations distinguish variable features with sizes tens of km on the planet.The fine scale temporal and spatial features seen in the main oval itself show that complex structures present even during quiet solar wind conditions. We observe diffuse ultraviolet emissions southward of the southern midnight main oval that are not seen in the infrared.This implies a steep temperature gradient, ∼60 K over 2-4 • latitude equator wad of the main oval. Lower spatial resolution observations reveal broad-scale dynamics at both poles, variable over minutes to hours, the morphology of which is only partly consistent with a overlapping local-time fixed and co-rotating current systems. We also present the first direct comparison of simultaneous infrared, visible, and ultraviolet auroral emissions at Saturn. These emissions are co-located, even though the spatial scale and operational mode of each instrument are very different.

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“…Infrared Fulcher band emission measurements of H 2 /HD/D 2 molecules followed by Dieke and Blue in 1935 [19], and more recently the visible and infrared emission spectrum has been studied by Aguilar et al [20], Bailly and Vervloet [21]. The electronic and vibrational transition probabilities for B 1 R þ u !…”

Section: Introductionmentioning

confidence: 99%

Lyman transitions of high rovibrationally excited H2, HD and D2 molecules

Gabriel

Dungen

Roueff

et al. 2009

Journal of Molecular Spectroscopy

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The Electron‐Excited Mid‐Ultraviolet to Near‐Infrared Spectrum of H₂: Cross Sections and Transition Probabilities

Cited by 21 publications

References 62 publications

Low-Temperature hydrogenation of diamond nanoparticles using diffuse coplanar surface barrier discharge at atmospheric pressure

Low-Temperature hydrogenation of diamond nanoparticles using diffuse coplanar surface barrier discharge at atmospheric pressure

Simultaneous multi-scale and multi-instrument observations of Saturn’s aurorae during the 2013 observing campaign

Lyman transitions of high rovibrationally excited H2, HD and D2 molecules

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The Electron‐Excited Mid‐Ultraviolet to Near‐Infrared Spectrum of H2: Cross Sections and Transition Probabilities

Cited by 21 publications

References 62 publications

Low-Temperature hydrogenation of diamond nanoparticles using diffuse coplanar surface barrier discharge at atmospheric pressure

Low-Temperature hydrogenation of diamond nanoparticles using diffuse coplanar surface barrier discharge at atmospheric pressure

Simultaneous multi-scale and multi-instrument observations of Saturn’s aurorae during the 2013 observing campaign

Lyman transitions of high rovibrationally excited H2, HD and D2 molecules

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The Electron‐Excited Mid‐Ultraviolet to Near‐Infrared Spectrum of H₂: Cross Sections and Transition Probabilities