Electron scattering from C 2 -C 8 symmetric ether molecules

Modak, Paresh; Singh, Shailendra; Kaur, Jaspreet; Antony, Bobby

doi:10.1016/j.ijms.2016.09.002

Cited by 11 publications

(22 citation statements)

References 37 publications

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“…Hence, it is vital to study the interaction of these molecules with positrons. A modified form of the quantum mechanical approach, namely the SCOP and CSP‐ic formalism has been implemented in the present work to calculate the direct ionization, Ps formation, total ionization and total cross section for positron‐ XH 4 scattering. The calculation is done for an extensive energy range of 1 eV to 5 keV for the present set of molecules, viz.…”

Section: Discussionmentioning

confidence: 99%

“…However, the modifications mentioned in the previous sub‐section allows for the efficient inclusion of this channel in our formalism. This phenomenological approach is incorporated in the SCOP method to compute various inelastic cross sections.…”

Section: Methodsmentioning

confidence: 99%

“…Here Q in is the inelastic cross section without considering the Ps formation channel. Using this modification, the familiar CPS‐ic method can be employed to find direct ionization cross section from this inelastic channel. The first term in Equation dies off rapidly above I and become less significant than the second term.…”

Section: Methodsmentioning

confidence: 99%

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Theoretical study of positron scattering by group 14 tetra hydrides: A quantum mechanical approach

Sinha

Singh

Antony

2018

Int J of Quantum Chemistry

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The present work provides a comprehensive set of positron impact scattering cross sections for group 14 tetrahydrides, namely, SiH4, GeH4, SnH4, and PbH4. The well‐established spherical complex optical potential and complex scattering potential‐ionization contribution methods are modified to incorporate positron scattering in the present work to calculate various cross sections. The positronium formation channel is adequately included through an improved inelastic threshold. The energy range chosen for the direct ionization cross section is from the respective ionization potential (I) of the molecule to 5 keV. Likewise, positronium formation and total ionization cross sections are reported from the positronium formation threshold to 300 eV and 5 keV, respectively, and the total cross section is computed for an extensive energy range of 1 eV to 5 keV. The positron impact total cross section for stannane molecule is computed for the first time. A characteristic valley is observed in the total cross sections with minima close to the positronium formation threshold. Further increase of cross section signifies the opening of inelastic channels especially positronium formation. In general, a reasonable agreement is found between the present results and other comparisons, wherever available. Furthermore, this is the first report of the inelastic cross sections (direct ionization, positronium formation, and total ionization) for the present set of targets.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Theoretical study of positron scattering by group 14 tetra hydrides: A quantum mechanical approach

Sinha

Singh

Antony

2018

Int J of Quantum Chemistry

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“…Literature survey reveals that there is limited data available for DME. Only two articles , dedicated to electron scattering studies of DME are found. Sugohara et al .…”

Section: Introductionmentioning

confidence: 99%

“…For the high-energy calculation, the SCOP formalism is implemented by adopting an “effective potential method (EPM)” to comprehend the molecular structure. In the literature, we usually find the multiscattering approach under which the molecule is divided into different scattering centers. , The cross section from these respective groups or centers is added to get the molecular cross section. However, this approach might lead to the overestimation of the cross section as the size of the molecule becomes bigger.…”

Section: Introductionmentioning

confidence: 99%

Low-Energy Electron Scattering from Dimethyl Ether

Sinha

Antony

2020

J. Phys. Chem. A

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Low-energy (0.1 to 15 eV) R-matrix calculation is performed for dimethyl ether molecule. Electronic excitation and momentum transfer cross section for low energies are reported for the first time. Present differential cross sections show good agreement with previous data in terms of shape but are significantly higher in magnitude. Apart from low energies, we have also performed high-energy calculation (11−5000 eV) using spherical complex optical potential formalism. To deal with the molecular nature of the present target, we have applied an effective potential method in our computation for the first time. Good consistency can be seen at the overlapping energies of the two calculations.

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