Elastic electron scattering from formamide

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An experimental investigation of elastic electron scattering by trimethyl phosphate (C3H9PO4) is presented. Differential cross sections were measured in the 5–800 eV and 10°–130° and from these data momentum-transfer cross sections were derived. Calculations of the scattering cross sections in the intermediate energy range were performed within the independent atom model framework at static-exchange-polarization plus absorption level of approximation. The comparison between our measured and calculated results presents, in general, a good agreement.

Section: Resultssupporting

confidence: 90%

Section: Methodsmentioning

confidence: 84%

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Elastic electron collisions with trimethyl phosphate

Bardela¹,

Silva²,

Mata³

et al. 2021

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“…Two experimental setups at UFSCar were used to perform the DCS measurements. Both spectrometers were described elsewhere [34][35][36][37] and will be briefly presented here. The measurements at energies below 100 eV were performed using a spectrometer [37] that employs a commercial electron source (Comstock EG-451) composed of an electron gun and a spherical sector electrostatic energy monochromator of a 36.5 mm mean radius with entrance and exit apertures of 1.0 mm and 0.5 mm diameters, respectively.…”

Section: Intermediate Energy Ufscar Experimentsmentioning

confidence: 99%

“…For the higher E 0 energies of the UFSCar data, the shapes of the MCOP DCS curves were used as a reference to extend the data from 20 to 150 eV to near the forward and backward directions. Above 200 eV, the extrapolations were carried out following the IAM trends at high angles, and at the forward direction, the extrapolations were carried out manually [35].…”

Section: Integral Cross Sectionsmentioning

confidence: 99%

Elastic electron scattering from chlorobenzene

Mata¹,

Hlousek²,

Bardela³

et al. 2020

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We report a joint theoretical–experimental investigation on elastic electron scattering by chlorobenzene in the low- and intermediate-energy ranges as a part of a collaborative project established between the Federal University of São Carlos (UFSCar) and the California State University (CSUF). More specifically, experimental elastic differential cross sections (DCS), in the incident electron energy range of 1.0 to 800 eV and scattering angle range of 10° to 130°, were measured using the crossed-beam relative-flow technique. Integral and momentum-transfer cross sections were determined from the numerical integration over the experimental DCS. Theoretically, elastic differential, integral, and momentum-transfer cross sections were calculated using a combination of a molecular complex optical potential model with the Padé approximant technique for impact energies ranging from 1.0 to 150 eV. Further calculations of DCS were performed at an energy range of 20 to 500 eV using the independent-atom model. Our results, which significantly extend available electron scattering cross sections for this target, are compared to existing theoretical and experimental data in the literature.

Low to intermediate energy elastic electron scattering from dichloromethane (CH₂Cl₂)

Hlousek¹,

Martin²,

Zawadzki³

et al. 2018

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We report a theoretical-experimental investigation of electron scattering by dichloromethane (CH 2 Cl 2) in the low-and intermediate energy ranges. Experimental elastic differential cross sections (DCS), in the incident electron energy range of 0.5-800eV and scattering angle range of 10°-130°, were measured using a crossed beam relative flow technique. Integral and momentumtransfer cross sections were determined from the experimental DCS. Theoretical elastic differential, integral, and momentum-transfer, as well as grand-total, and total absorption cross sections were also calculated for impact energies ranging from 0.5 to 500eV. A complex optical Hartree-Fock potential represented the electron-target interaction and a single-center expansion method combined with a Padé approximation was used to solve the scattering equations. Three resonances: a 2 A 1 C-Cl kσ * resonance centered at about 3.5eV, a 2 B 2 C-Cl kσ * resonance centered at about 5eV and a broad 2 A 1 C-H kσ * resonance at about 10eV were detected in our calculation. Further calculations of DCS were performed at an intermediate energy range of 50-800eV, using the independent-atom model in which the atomic complex optical potential and partial-wave method were used to obtain atomic scattering amplitudes. Comparisons of our experimental and theoretical data with very recent experimental and theoretical results are made.