Detection of Metastable Atoms and Molecules using Rare Gas Matrices

McConkey, J W; Kedzierski, W.

doi:10.1016/b978-0-12-800129-5.00001-8

Cited by 8 publications

(5 citation statements)

References 97 publications

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“…Considering the markedly different time ranges in figures 1 and 2 it is clear that both atomic and molecular metastable fragments are being detected. The most likely atomic metastable is O( 1 S) since this is known [27] to produce radiation in the red upon impact on xenon solid layers. Other atomic metastables such as O( 5 S) do not produce a signal within the wavelength range covered by the photomultiplier.…”

Section: Resultsmentioning

confidence: 99%

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Metastable fragment production in electron–methanol collisions

Dech

Kedzierski

McConkey

2020

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

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Dissociative excitation of methanol (CH3OH) by electron impact leading to the production of O(1S) and CO(a3Π) has been studied in the energy range from threshold to 100 eV using a unique detector which is selectively sensitive to low energy metastable particles. Time of flight techniques are used to separate atomic and molecular fragment species. Energy considerations have allowed certain excitation channels producing O(1S) to be identified.

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Section: Resultsmentioning

confidence: 99%

“…The experimental apparatus has been illustrated and discussed in detail in earlier publications [27,28] so only a brief overview is included here. A crossed electron-molecular beam set-up was used to produce collision fragments.…”

Section: Methodsmentioning

confidence: 99%

Metastable fragment production in electron–methanol collisions

Dech

Kedzierski

McConkey

2020

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

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“…Experimental methods, other than the above two ionization methods by electrons and photons, can be used to determine radicals from the processes caused by the electron impact. One such method uses specialized detectors based on rare gas matrices that can detect certain metastable species selectively [134]. However, there are only a few reports in which this type of detector was used.…”

Section: Neutral Detection By Other Techniquesmentioning

confidence: 99%

Electron scattering processes: fundamentals, challenges, advances, and opportunities

Ptasińska

Varella²,

Khakoo³

et al. 2022

Eur. Phys. J. D

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Much effort has been devoted to describing qualitatively and quantitatively electron scattering processes due to their ever-increasing importance in many industrial and medical applications. We present achievements made in the last years, focusing on some of the advancements and recent progress in the field. Particular reference is made on concrete case studies to probe the level of accord in cross-section data obtained from experiments and theory, as well as on selected instrumentation developments to probe dynamics of dissociative processes induced by electron impact. We stress that the purpose of this colloquium paper is not to be a comprehensive review but rather to provide a snapshot of different research topics in electron scattering by pointing out certain challenges and, therefore, indicating opportunities to facilitate further experimental and theoretical work.

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“…The equipment which we used in this work has been described extensively elsewhere [11] so only a brief summary will be included here. A crossed electron-N 2 beam system is used with detection of dissociation products in a separate chamber located orthogonally to the two beams.…”

Section: Apparatusmentioning

confidence: 99%

“…In the case of N( 2 P) this resultant lifetime shortening is by a remarkable 7 orders of magnitude. We had used this technique previously [11] to detect the equivalent low lying states of atomic oxygen. In this previous work we were able to use spectral information from experiments [12] where fluorescence was observed from small amounts of oxygen frozen in rare gas matrices when bombarded with high energy electrons.…”

Section: Introductionmentioning

confidence: 99%

N (²P) production in electron-N₂collisions

Kedzierski¹,

Dech²,

McConkey³

2017

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

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A unique detector which is selectively sensitive to low energy metastable atoms, has been used to study the production of ground state N (2P) atoms following collisions of low energy (0–200 eV) electrons with molecular nitrogen. Time-of-flight techniques have revealed the existence of at least two distinct mechanisms yielding this dissociation product. Released kinetic energies in the dissociation have allowed positioning of the parent molecular states in the Franck–Condon region. This, together with excitation probability curves, has allowed probable parent states, such as B′ b′ and C′ 3Πu, to be identified making use of recent theoretical calculations. Both direct and pre-dissociation processes are shown to be involved.

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Detection of Metastable Atoms and Molecules using Rare Gas Matrices

Cited by 8 publications

References 97 publications

Metastable fragment production in electron–methanol collisions

Metastable fragment production in electron–methanol collisions

Electron scattering processes: fundamentals, challenges, advances, and opportunities

N (²P) production in electron-N₂collisions

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Detection of Metastable Atoms and Molecules using Rare Gas Matrices

Cited by 8 publications

References 97 publications

Metastable fragment production in electron–methanol collisions

Metastable fragment production in electron–methanol collisions

Electron scattering processes: fundamentals, challenges, advances, and opportunities

N (2P) production in electron-N2collisions

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N (²P) production in electron-N₂collisions