Triple differential cross section measurements for the electron-impact ionization of the highest occupied molecular orbitals of tetrahydropyran and 1,4-dioxane are presented. For each molecule, experimental measurements were performed using the (e,2e) technique in asymmetric coplanar kinematics with an incident electron energy of 250 eV and an ejected electron energy of 20 eV. With the scattered electrons being detected at -5°, the angular distributions of the ejected electrons in the binary and recoil regions were observed. These measurements are compared with calculations performed within the molecular 3-body distorted wave model. Here, reasonable agreement was observed between the theoretical model and the experimental measurements. These measurements are compared with results from a recent study on tetrahydrofuran [D. B. Jones, J. D. Builth-Williams, S. M. Bellm, L. Chiari, C. G. Ning, H. Chaluvadi, B. Lohmann, O. Ingolfsson, D. Madison, and M. J. Brunger, Chem. Phys. Lett. 572, 32 (2013)] in order to evaluate the influence of structure on the dynamics of the ionization process across this series of cyclic ethers.



Keywords and Phrases

Coplanar kinematics; Distorted-wave models; Electron-impact ionization; Highest occupied molecular orbital; Incident electrons; Scattered electrons; Theoretical modeling; Triple differential cross sections; Angular distribution; Dissociation; Electron energy levels; Electron scattering; Impact ionization; Polyols; Ethers

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Article - Journal

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Final Version

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© 2013 American Institute of Physics (AIP), All rights reserved.

Publication Date

01 Jun 2013

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Physics Commons