English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present cross sections for the neutral dissociation of methane, in a largepart obtained through analytical approximations. With these cross sections thework of Song $\textit{et al.}$ [J. Phys. Chem. Ref. Data, $\textbf{44}$,023101, (2015)] can be extended which results in a complete and consistent setof cross sections for the collision of electrons with up to 100 eV energy withmethane molecules. Notably, the resulting cross section set does not requireany data fitting to produce bulk swarm parameters that match with experiments.Therefore consistency can be considered an inherent trait of the set, sinceswarm parameters are used exclusively for validation of the cross sections.Neutral dissociation of methane is essential to include (1) because it is acrucial electron energy sink in methane plasma, and (2) because it largelycontributes to the production of hydrogen radicals that can be vital forplasma-chemical processes. Finally, we compare the production rates of hydrogenspecies for a swarm-fitted data set with ours. The two consistent cross sectionsets predict different production rates, with differences of $45\%$ (at $100$Td) and $125\%$ (at $50$ Td) for production of H$_2$ and a similar trend forproduction of H. With this comparison we underline that the swarm-fittingprocedure, used to ensure consistency of the electron swarm parameters, canpossibly deteriorate the accuracy with which chemical production rates areestimated. This is of particular importance for applications with an emphasison plasma-chemical activation of the gas.

Neutral dissociation of methane by electron impact and a complete and consistent cross section set