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Electron scattering by trimethylene oxide, , molecules
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Image of FIG. 1.
FIG. 1.

Cross sections for electron scattering from molecules. The present results for the ring isomer, : Experimental (full circles) absolute TCSs, error bars denote overall uncertainties; sum (dashed line) of computed integral ECS, and ICS. To show the isomer effect, the experimental results (open diamonds) for the open-chain isomer, , from Ref. 24 are also presented. Molecule pictographs are included.

Image of FIG. 2.
FIG. 2.

Schematic geometry of the heterocyclic molecules, .

Image of FIG. 3.
FIG. 3.

Comparison of experimental TCSs for electron scattering on (full triangles), from Ref. 33; (full circles), present; (open squares), from Ref. 30.

Image of FIG. 4.
FIG. 4.

Cross sections for low-energy electron scattering from the cyclic , , molecules. (a) : (full triangles), TCS experimental from Ref. 33; (solid line), calculated integral BCS, see the text, present. (b) : (full circles), TCS experimental, present; (solid line), calculated BCS, present. (c) . Experimental: (full squares), TCS from Ref. 30; (open diamonds), TCS from Ref. 35, line through experimental points is added to guide the eye; (open circles), total from Ref. 36; (open triangles), elastic from Ref. 36; Theoretical: (dot line), elastic plus electronically inelastic (using the -matrix method, with Born correction) from Ref. 39; (dot-dash line), elastic (using the -matrix method) from Ref. 40; (dot-dot-dash line), momentum transfer cross section (using the complex Kohn variational method) from Ref. 37; (dash line), elastic (using the Schwinger multichannel method, without explicit correction for the point-dipole interaction) from Ref. 38; (solid line), BCS, present.

Image of FIG. 5.
FIG. 5.

Comparison of the experimental and/or calculated TCSs with these estimated from the partitioning scheme (see text, Sec. IV C) for the electron scattering from cyclic molecules. Experimental: (full triangles), from Ref. 33; (full circles), present; (open squares), from Ref. 30. Estimated, present: Oxygen atom (asterisks); (crosses); (dash line); (dot line); (dot-dash line); (dot-dot-dash line). Calculated: Sum of ECSs and ICSs, (solid line), present.


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Table I.

Absolute TCSs measured for electron impact on trimethylene oxide molecules, , in units of .

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Table II.

Summary of molecular electric dipole moments , electric dipole polarizabilities , and the gas-kinetic cross sections for cyclic series, .

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Table III.

ICS and integral ECS calculated for electron impact on and molecules, in .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Electron scattering by trimethylene oxide, c-(CH2)3O, molecules