Dissociation patterns in N2O following electron impact

Allcock, G.R.; McConkey, J W

doi:10.1016/0301-0104(78)80033-0

Cited by 26 publications

(12 citation statements)

References 17 publications

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“…Because of their long lifetimes, single particle detection of most metastable species is very difficult in the laboratory. Various attempts to detect oxygen metastables such as using Auger emission from a low work function surface (Gilpin andWelge 1971, Allcock andMcConkey 1978), using a chemi-ionization process (Stone et al 1976) or by detection of inelastically scattered electrons, all suffered from a lack of discrimination against other atomic or molecular species in addition to not being particularly sensitive. More recently laser or synchrotron-based techniques such as REMPI or VUV ionization have been used to monitor the production of specific fragments (e.g.…”

Section: Introductionmentioning

confidence: 99%

Metastable oxygen atom detection using rare gas matrices

Kedzierski¹,

Blejdea²,

DiCarlo³

et al. 2010

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

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Abstract:The use of solid rare gas matrices as detectors of metastable oxygen atoms is investigated. A 100 eV electron beam colliding with N2O target gas is used as the source of O( 1 S). Parameters considered are surface temperature, time delay of excimer emission and spectral response to O( 1 S). In all cases detector sensitivity maximised at temperatures ≤20K. Krypton was found to provide the most sensitive surface and Ne the least.

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Section: Introductionmentioning

confidence: 99%

Metastable oxygen atom detection using rare gas matrices

Kedzierski¹,

Blejdea²,

DiCarlo³

et al. 2010

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

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“…It plays an important role in stratospheric photochemistry, particularly with regard to ozone, and in the overall global radiation budget (e.g., [1,2]). Because it is known to produce a wide range of metastable fragments upon dissociation (see [3,4]), N 2 O can be a very active species in any discharge situation. In the ground state it has a linear, asymmetric (N-N-O) configuration with a small (0.28 D) dipole moment.…”

Section: Introductionmentioning

confidence: 99%

Dissociative excitation of N₂O by electron impact

Malone¹,

Johnson²,

McConkey³

et al. 2008

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

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Vacuum ultraviolet emissions following electron impact dissociative excitation of N2O have been studied over the wavelength range 80–180 nm and for electron energies from threshold up to 300 eV. Calibrated spectral data are presented at 100 eV incident energy. The dominant N I (2p3 4S°–3s 4P) multiplet at 120.0 nm has a measured maximum cross section of (2.2 ± 0.4) × 10−18 cm2 at 100 eV, which in turn was used to normalize 100 eV cross sections for all observed spectral features. In addition, excitation functions corresponding to the dominant emission features have been analysed in detail with particular emphasis on the near-threshold region. Possible dissociation channels are discussed.

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“…Previous attempts to detect O( 1 S) by techniques such as Auger emission from a low work function surface (Alcock and McConkey, 1978;Gilpin and Welge, 1971), by a chemi-ionization process (Stone et al, 1976), or by detection of inelastically scattered electrons, were limited by a lack of sensitivity or suffered from poor discrimination against other metastable atomic or molecular species, such as O( 5 S), or ground state O( 3 P), and generally suffered from poor signal to background ratios. Optical methods to record emissions from the low lying oxygen metastables relied on buffering the metastable atoms from the walls using rare gases such as He, as used by McLennan and Shrum (1925) in their historic experiment or by lifetime shortening through excimer formation with high pressure Kr or Xe gases (Cooper et al, 1961;Cunningham and Clark, 1974;Herman and Herman, 1950;Huestis et al, 1975;Kenty et al, 1946;Simmons et al, 1979).…”

Section: Basic Concepts 21 Relevant Backgroundmentioning

confidence: 99%