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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Electron vortex beams (EVB, also known as twisted electron beams) possess anintrinsic orbital angular momentum (OAM) with respect to their propagationdirection. This intrinsic OAM represents a new degree of freedom that providesnew insights into investigating the dynamics of electron impact ionization. Inthis communication, we present, in the first-Born approximation (FBA), theangular profiles of the triple differential cross-section (TDCS) for the (e,2e) process on CH4 and NH3 molecular targets in the coplanar asymmetricgeometry. We compare the TDCS of the EVB for different values of OAM number mwith that of the plane wave. For a more realistic scenario, we investigate theaverage TDCS for macroscopic targets to explore the influence of the openingangle {\theta}p of the twisted electron beam on the TDCS. In addition, we alsopresent the TDCS for the coherent superposition of two EVBs. The resultsdemonstrate that the twisted (e, 2e) process retrieves the p-type character ofthe molecular orbitals, which is absent in the plane wave TDCS for the givenkinematics. The results for the coherent superposition of two Bessel beams showthe sensitivity of TDCS towards the OAM number m.

Dynamics of twisted electron impact ionization of CH4 and NH3 molecule