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Paweł Możejko

Gdansk University of Technology, Division of Electron Collisions Physics, Faculty Member

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Ana Isabel Lozano Martínez

Kadi Sarva Vishva Vidhyalaya

Grzegorz Karwasz

Uniwersytet Mikołaja Kopernika w Toruniu

Czesław Szmytkowski

Abhishek Prashant

FRANCISCO BLANCO RAMOS

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Papers by Paweł Możejko

Cross-Section Calculations for Electron-Impact Ionization of Pyrimidine Molecule and Its Halogenated Derivatives: 2-Chloropyrimidine, 5-Chloropyrimidine, 2-Bromopyrimidine and 5-Bromopyrimidine

Molecules, 2025

The total cross-sections for the single electron-impact ionization of pyrimidine (C 4 H 4 N 2), 2... more The total cross-sections for the single electron-impact ionization of pyrimidine (C 4 H 4 N 2), 2-chloropyrimidine (2-C 4 H 3 ClN 2), 5-chloropyrimidine (5-C 4 H 3 ClN 2), 2bromopyrimidine (2-C 4 H 3 BrN 2) and 5-bromopyrimidine (5-C 4 H 3 BrN 2) molecules have been calculated with the binary-encounter-Bethe model from the ionization threshold up to 5 keV. The input data for the BEB calculations concerning electronic structure of the studied targets have been obtained with quantum chemical methods including the Hartree-Fock (H-F) and the outer valence Green function (OVGF) methods. The calculated cross-section for the ionization of the pyrimidine molecules due to electron impact is compared with available experimental and theoretical data. The question of the magnitude the pyrimidine ionization cross-section is also discussed, as is the efficiency of the ionization process of studied halogenated derivatives of pyrimidine.

Measurements of absolute total cross sections for electron scattering from triatomic polar molecules: SO2 and H2S

Radiation Physics and Chemistry, Sep 1, 2003

Absolute total electron-scattering cross sections (TCSs) have been measured in the energy range f... more Absolute total electron-scattering cross sections (TCSs) have been measured in the energy range from 0.5 to 370 eV for SO 2 and from 6 to 370 eV for H 2 S molecules. Measurements have been carried out using modified electron spectrometer working in a linear transmission mode. The present results are compared to published experimental TCS data. Some aspects important for achieving accurate absolute total cross sections in an electron transmission experiment are discussed.

Absolute total cross-section measurements for electron collisions with tetrahydrofuran

Physical Review A, Jul 12, 2006

The absolute total cross section ͑TCS͒ for electron collisions with tetrahydrofuran C 4 H 8 O in ... more The absolute total cross section ͑TCS͒ for electron collisions with tetrahydrofuran C 4 H 8 O in the gas phase has been measured using the linear transmission technique within 1-370 eV energy range. The total cross section function for e −-C 4 H 8 O collisions is characterized by the relatively high magnitude and the broad enhancement spanned between 4 and 12 eV, with some resonantlike structures. This enhancement can be explained as a result of overlapping core-excited resonances. At higher collision energies the magnitude of the measured total cross section monotonically decreases with the energy increase. At low impact energies some additional weak resonant features are visible near 1.9 and 3.5 eV. The reported TCS results are higher by 30% than recently published by Zecca et al. ͓J. Phys. B 38, 2079 ͑1995͔͒. They are also distinctly different from the recent R-matrix calculations. At intermediate energy range the present data agree well with the sum of calculated elastic and ionization cross sections.

Absolute total cross-section measurements for electron collision with tetrahydrofuran

Physical Review A, 2006

The absolute total cross section ͑TCS͒ for electron collisions with tetrahydrofuran C 4 H 8 O in ... more The absolute total cross section ͑TCS͒ for electron collisions with tetrahydrofuran C 4 H 8 O in the gas phase has been measured using the linear transmission technique within 1-370 eV energy range. The total cross section function for e −-C 4 H 8 O collisions is characterized by the relatively high magnitude and the broad enhancement spanned between 4 and 12 eV, with some resonantlike structures. This enhancement can be explained as a result of overlapping core-excited resonances. At higher collision energies the magnitude of the measured total cross section monotonically decreases with the energy increase. At low impact energies some additional weak resonant features are visible near 1.9 and 3.5 eV. The reported TCS results are higher by 30% than recently published by Zecca et al. ͓J. Phys. B 38, 2079 ͑1995͔͒. They are also distinctly different from the recent R-matrix calculations. At intermediate energy range the present data agree well with the sum of calculated elastic and ionization cross sections.

Electron scattering on C6F6 and SF6

Eur Phys J D, 1997

Total cross sections for electron scattering from selected hydrocarbons: the substitutional and additivity effects

Abstract IJMS 365 GK

Electron scattering from hexafluoride molecules: WF6and C2F6. Absolute total cross section measurements from 1 to 250 eV

Journal of Physics B: Atomic, Molecular and Optical Physics, 1999

Electron-scattering absolute total cross sections for tungsten hexafluoride (WF 6) and hexafluore... more Electron-scattering absolute total cross sections for tungsten hexafluoride (WF 6) and hexafluorethane (C 2 F 6) molecules have been measured in a linear transmission electron-beam experiment within the impact energy range from about 1 to 250 eV. For electron scattering from WF 6 the cross section shows a prominent resonant-like peak centred at 3 eV and a very broad enhancement in the energy range between 20 and 70 eV overlaid with some much less pronounced features. The cross section for C 2 F 6 has two resonant structures at 5 and 9 eV, respectively, and a very broad hump ranging from 20 to 60 eV with a distinct shoulder near 20 eV. Comparison of the e −-C 2 F 6 total cross section with available low-energy data from other experiments is made. The effect of fluorination is indicated.

Cross section calculations for electron scattering from platinum chemotherapeutic compounds

The European Physical Journal Special Topics, 2013

ABSTRACT Cross section for electron impact ionization of carboplatin, C6H12N2O4Pt, and oxaliplati... more ABSTRACT Cross section for electron impact ionization of carboplatin, C6H12N2O4Pt, and oxaliplatin, C8H14N2O4Pt, have been calculated within binary-encounter-Bethe model for energies from the ionization threshold up to 5000 eV. Cross section for elastic electron scattering from carboplatin and oxaliplatin molecules have also been derived using independent atom method (IAM) and additivity rule for collision energies ranging from 50 eV to 3000 eV. Obtained cross sections have been compared with relevant cross sections for cisplatin molecules.

Calculations of electron impact ionization cross section for simple biomolecules: Formic and acetic acids

The European Physical Journal Special Topics, 2007

Experimental absolute total cross sections for low-energy electron collisions with tetrahedral compounds of germanium

Journal of Physics B: Atomic, Molecular and Optical Physics, 1998

Absolute total cross section (TCS) of the electron collision with GeF 4 molecules has been measur... more Absolute total cross section (TCS) of the electron collision with GeF 4 molecules has been measured in a linear transmission experiment for impact energies from 0.5 to 250 eV. The TCS function is dominated by a steep rise towards low energies below 3 eV. At energies above the minimum at 3 eV the TCS shows another enhancement spanned up to about 70 eV on which some resonant-like features are visible: the maximum centred near 6.5 eV and two weak peaks at 16 and 25 eV, respectively. A comparison with the recent measurements taken in the same laboratory for GeH 4 and GeCl 4 and for other targets of the same symmetry is made to search for similarities and/or differences between electron scattering TCSs for tetrahedral molecules. The data demonstrate that the general shape of the low-energy TCS for tetrahedral molecules depends on external rather than on central atoms.

Cross sections for electron collision with five-membered ring heterocycles

The European Physical Journal D, 2012

The absolute total cross-section (TCS) for electron scattering from isoxasole, (CH)3NO, molecule ... more The absolute total cross-section (TCS) for electron scattering from isoxasole, (CH)3NO, molecule has been measured using the linear transmission technique for impact energies ranging from 1 to 400 eV. The measured TCS energy dependence appears typical for highly polar targets; over whole energy range applied, the magnitude of TCS generally decreases as the energy increases. Some narrow features located near 1.2 and 2.7 eV have been observed in the TCS curve as well as a broad enhancement spanned between 5 and 15 eV. The TCS for electron-isoxazole scattering has been compared with TCS data for furan, (CH)4O; differences and similarities in the appearance of both TCSs energy functions are indicated and discussed. In addition, for several five-membered ring heterocycle molecules: isoxazole, pyrrole [(CH)4NH] and tiophene [(CH)4S], integral elastic (ECS) and ionization (ICS) cross sections have been calculated at intermediate and high electron-impact energies in the additivity rule approximation and the binary-encounter-Bethe approach, respectively. For isoxazole and furan the sums of ECS and ICS are in very good agreement with the respective measured TCSs above 50−60 eV.

Joint experimental and theoretical study on electron scattering from titanium tetrachloride (TiCl4) molecule

The Journal of Chemical Physics

Absolute grand-total cross section for electron scattering from titanium tetrachloride, TiCl4, mo... more Absolute grand-total cross section for electron scattering from titanium tetrachloride, TiCl4, molecule was measured at electron-impact energies ranging from 0.3 to 300 eV, in the linear electron-transmission experiment. The elastic integral, differential, momentum transfer, and total ionization cross sections for TiCl4 molecule were also calculated for low and intermediate collisional energies at the level of various theories. The low-energy elastic integral, differential, and momentum transfer cross sections were calculated with the Schwinger multichannel method implemented with pseudopotentials, in the static-exchange and static-exchange plus polarization levels of approximation, for energies up to 30 eV. The integral cross section calculated for low-energy electron scattering with the R-matrix method within the static-exchange and static-exchange plus polarization approximations for energies up to 15 eV are also reported. By the inspection of the cross sections, the presence of ...

Methylation effect in e−— scattering on methyl-substituted ethylenes

Journal of Physics: Conference Series, 2020

Synopsis Methylation effect has been observed and studied in electron-scattering from selected hy... more

Electron elastic collisions with C3F6 molecule

We report calculations of differential and integral cross sections for intermediate- and high-ene... more We report calculations of differential and integral cross sections for intermediate- and high-energy (50-1000eV) elastic collisions of electrons with hexafluoropropene (C3F6) molecules. The calculations have been carried out using the independent atom model with static-polarization model potential. The present results are compared with elastic cross sections estimated from total and ionization experiments. Agreement between present calculations and the "experiment" is good for energies above 70eV

Low- and intermediate-energy total electron scattering cross sections for SiH4 and GeCl4 molecules

Journal of Physics B: Atomic, Molecular and Optical Physics, 1997

Absolute total cross sections for electron collision with SiH 4 and GeCl 4 molecules have been me... more Absolute total cross sections for electron collision with SiH 4 and GeCl 4 molecules have been measured in a linear attenuation experiment for impact energies ranging from 0.6 to 250 eV. Good agreement of the present e −-SiH 4 results with other experimental data has been found in respect of the energy dependence of the total cross section (TCS). Discrepancies in magnitude are only apparent for the lowest and the highest impact energies applied. Comparison is also made with theoretical calculations. The electron-scattering TCS for GeCl 4 shows two distinct resonant maxima: one at 1.7 eV, occurring over a narrow energy range, the other-much broader-near 9 eV. No TCS data for GeCl 4 are available for comparison.

Electron-scattering total cross sections for triatomic molecules: NO2 and H2O

Optica Applicata, 2013

Absolute total cross sections (TCSs) for electron scattering on nitrogen dioxide (NO 2) molecules... more Absolute total cross sections (TCSs) for electron scattering on nitrogen dioxide (NO 2) molecules and on water-vapour (H 2 O) were measured at energies ranging from 3 to 370 eV and 0.5 to 370 eV, respectively. Measurements were carried out using an electron spectrometer with an improved angular and energy resolution. The presented experimental TCS results are at intermediate energies compared with our total cross section estimations based on calculations of elastic and ionization cross sections.

Recent total cross section measurements in electron scattering from molecules

The European Physical Journal D, 2020

The grand-total cross sections (TCSs) for electron scattering from a range of molecules, measured... more The grand-total cross sections (TCSs) for electron scattering from a range of molecules, measured over the period 2009–2019 in various laboratories, with the use of different electron transmission systems, are reviewed. Where necessary, the presented TCS data are also compared to earlier results. Collection of investigated molecular targets (biomolecules, biofuels, molecules of technological application, hydrocarbons) reflects their current interest in biology, medicine, ecology and industry. Most of measurements covered the energy range from about 1 eV to some hundreds of eV, with a few exceptions extending those limits down to near thermal or up to almost high impact energies. The importance of reliable TCS data in the field of electron-scattering physics is emphasized. Problems encountered in TCS experiments are also specified. Graphical abstract

Electron-impact ionization cross section calculations for 5-chloropyridine and 5-bromopyridine molecules

Journal of Physics: Conference Series, 2020

Synopsis The total cross sections for the single electron-impact ionization of 5-chloropyridine (... more

Electron scattering from tin tetrachloride (SnCl4) molecules

The Journal of Chemical Physics, 2019

Absolute grand-total cross section (TCS) for electron scattering from a tin tetrachloride, SnCl4,... more Absolute grand-total cross section (TCS) for electron scattering from a tin tetrachloride, SnCl4, molecule was measured at electron-impact energies ranging from 0.6 to 300 eV, in the linear electron-transmission experiment. The measured TCS energy dependence shows two very pronounced enhancements peaking near 1.2 eV and around 9.5 eV, separated with a deep minimum centered close to 3 eV. The low energy structure is attributed to the formation of two short-living negative ion states. Additional weak structures in the TCS curve are also perceptible. We also calculated the integral elastic and ionization cross sections for SnCl4 up to 4 keV within the additivity rule approximation and the binary-encounter-Bethe approach, respectively. To examine the role of the central atom of tetrachloride target molecules in collisions with electrons, we compared the experimental TCS energy functions for XCl4 molecules (X = C, Si, Ge, Sn).

Cross-Section Calculations for Electron-Impact Ionization of Pyrimidine Molecule and Its Halogenated Derivatives: 2-Chloropyrimidine, 5-Chloropyrimidine, 2-Bromopyrimidine and 5-Bromopyrimidine

Molecules, 2025

The total cross-sections for the single electron-impact ionization of pyrimidine (C 4 H 4 N 2), 2... more The total cross-sections for the single electron-impact ionization of pyrimidine (C 4 H 4 N 2), 2-chloropyrimidine (2-C 4 H 3 ClN 2), 5-chloropyrimidine (5-C 4 H 3 ClN 2), 2bromopyrimidine (2-C 4 H 3 BrN 2) and 5-bromopyrimidine (5-C 4 H 3 BrN 2) molecules have been calculated with the binary-encounter-Bethe model from the ionization threshold up to 5 keV. The input data for the BEB calculations concerning electronic structure of the studied targets have been obtained with quantum chemical methods including the Hartree-Fock (H-F) and the outer valence Green function (OVGF) methods. The calculated cross-section for the ionization of the pyrimidine molecules due to electron impact is compared with available experimental and theoretical data. The question of the magnitude the pyrimidine ionization cross-section is also discussed, as is the efficiency of the ionization process of studied halogenated derivatives of pyrimidine.

Measurements of absolute total cross sections for electron scattering from triatomic polar molecules: SO2 and H2S

Radiation Physics and Chemistry, Sep 1, 2003

Absolute total electron-scattering cross sections (TCSs) have been measured in the energy range f... more Absolute total electron-scattering cross sections (TCSs) have been measured in the energy range from 0.5 to 370 eV for SO 2 and from 6 to 370 eV for H 2 S molecules. Measurements have been carried out using modified electron spectrometer working in a linear transmission mode. The present results are compared to published experimental TCS data. Some aspects important for achieving accurate absolute total cross sections in an electron transmission experiment are discussed.

Absolute total cross-section measurements for electron collisions with tetrahydrofuran

Physical Review A, Jul 12, 2006

The absolute total cross section ͑TCS͒ for electron collisions with tetrahydrofuran C 4 H 8 O in ... more The absolute total cross section ͑TCS͒ for electron collisions with tetrahydrofuran C 4 H 8 O in the gas phase has been measured using the linear transmission technique within 1-370 eV energy range. The total cross section function for e −-C 4 H 8 O collisions is characterized by the relatively high magnitude and the broad enhancement spanned between 4 and 12 eV, with some resonantlike structures. This enhancement can be explained as a result of overlapping core-excited resonances. At higher collision energies the magnitude of the measured total cross section monotonically decreases with the energy increase. At low impact energies some additional weak resonant features are visible near 1.9 and 3.5 eV. The reported TCS results are higher by 30% than recently published by Zecca et al. ͓J. Phys. B 38, 2079 ͑1995͔͒. They are also distinctly different from the recent R-matrix calculations. At intermediate energy range the present data agree well with the sum of calculated elastic and ionization cross sections.

Absolute total cross-section measurements for electron collision with tetrahydrofuran

Physical Review A, 2006

The absolute total cross section ͑TCS͒ for electron collisions with tetrahydrofuran C 4 H 8 O in ... more The absolute total cross section ͑TCS͒ for electron collisions with tetrahydrofuran C 4 H 8 O in the gas phase has been measured using the linear transmission technique within 1-370 eV energy range. The total cross section function for e −-C 4 H 8 O collisions is characterized by the relatively high magnitude and the broad enhancement spanned between 4 and 12 eV, with some resonantlike structures. This enhancement can be explained as a result of overlapping core-excited resonances. At higher collision energies the magnitude of the measured total cross section monotonically decreases with the energy increase. At low impact energies some additional weak resonant features are visible near 1.9 and 3.5 eV. The reported TCS results are higher by 30% than recently published by Zecca et al. ͓J. Phys. B 38, 2079 ͑1995͔͒. They are also distinctly different from the recent R-matrix calculations. At intermediate energy range the present data agree well with the sum of calculated elastic and ionization cross sections.

Electron scattering on C6F6 and SF6

Eur Phys J D, 1997

Total cross sections for electron scattering from selected hydrocarbons: the substitutional and additivity effects

Abstract IJMS 365 GK

Electron scattering from hexafluoride molecules: WF6and C2F6. Absolute total cross section measurements from 1 to 250 eV

Journal of Physics B: Atomic, Molecular and Optical Physics, 1999

Electron-scattering absolute total cross sections for tungsten hexafluoride (WF 6) and hexafluore... more Electron-scattering absolute total cross sections for tungsten hexafluoride (WF 6) and hexafluorethane (C 2 F 6) molecules have been measured in a linear transmission electron-beam experiment within the impact energy range from about 1 to 250 eV. For electron scattering from WF 6 the cross section shows a prominent resonant-like peak centred at 3 eV and a very broad enhancement in the energy range between 20 and 70 eV overlaid with some much less pronounced features. The cross section for C 2 F 6 has two resonant structures at 5 and 9 eV, respectively, and a very broad hump ranging from 20 to 60 eV with a distinct shoulder near 20 eV. Comparison of the e −-C 2 F 6 total cross section with available low-energy data from other experiments is made. The effect of fluorination is indicated.

Cross section calculations for electron scattering from platinum chemotherapeutic compounds

The European Physical Journal Special Topics, 2013

ABSTRACT Cross section for electron impact ionization of carboplatin, C6H12N2O4Pt, and oxaliplati... more ABSTRACT Cross section for electron impact ionization of carboplatin, C6H12N2O4Pt, and oxaliplatin, C8H14N2O4Pt, have been calculated within binary-encounter-Bethe model for energies from the ionization threshold up to 5000 eV. Cross section for elastic electron scattering from carboplatin and oxaliplatin molecules have also been derived using independent atom method (IAM) and additivity rule for collision energies ranging from 50 eV to 3000 eV. Obtained cross sections have been compared with relevant cross sections for cisplatin molecules.

Calculations of electron impact ionization cross section for simple biomolecules: Formic and acetic acids

The European Physical Journal Special Topics, 2007

Experimental absolute total cross sections for low-energy electron collisions with tetrahedral compounds of germanium

Journal of Physics B: Atomic, Molecular and Optical Physics, 1998

Absolute total cross section (TCS) of the electron collision with GeF 4 molecules has been measur... more Absolute total cross section (TCS) of the electron collision with GeF 4 molecules has been measured in a linear transmission experiment for impact energies from 0.5 to 250 eV. The TCS function is dominated by a steep rise towards low energies below 3 eV. At energies above the minimum at 3 eV the TCS shows another enhancement spanned up to about 70 eV on which some resonant-like features are visible: the maximum centred near 6.5 eV and two weak peaks at 16 and 25 eV, respectively. A comparison with the recent measurements taken in the same laboratory for GeH 4 and GeCl 4 and for other targets of the same symmetry is made to search for similarities and/or differences between electron scattering TCSs for tetrahedral molecules. The data demonstrate that the general shape of the low-energy TCS for tetrahedral molecules depends on external rather than on central atoms.

Cross sections for electron collision with five-membered ring heterocycles

The European Physical Journal D, 2012

The absolute total cross-section (TCS) for electron scattering from isoxasole, (CH)3NO, molecule ... more The absolute total cross-section (TCS) for electron scattering from isoxasole, (CH)3NO, molecule has been measured using the linear transmission technique for impact energies ranging from 1 to 400 eV. The measured TCS energy dependence appears typical for highly polar targets; over whole energy range applied, the magnitude of TCS generally decreases as the energy increases. Some narrow features located near 1.2 and 2.7 eV have been observed in the TCS curve as well as a broad enhancement spanned between 5 and 15 eV. The TCS for electron-isoxazole scattering has been compared with TCS data for furan, (CH)4O; differences and similarities in the appearance of both TCSs energy functions are indicated and discussed. In addition, for several five-membered ring heterocycle molecules: isoxazole, pyrrole [(CH)4NH] and tiophene [(CH)4S], integral elastic (ECS) and ionization (ICS) cross sections have been calculated at intermediate and high electron-impact energies in the additivity rule approximation and the binary-encounter-Bethe approach, respectively. For isoxazole and furan the sums of ECS and ICS are in very good agreement with the respective measured TCSs above 50−60 eV.

Joint experimental and theoretical study on electron scattering from titanium tetrachloride (TiCl4) molecule

The Journal of Chemical Physics

Absolute grand-total cross section for electron scattering from titanium tetrachloride, TiCl4, mo... more Absolute grand-total cross section for electron scattering from titanium tetrachloride, TiCl4, molecule was measured at electron-impact energies ranging from 0.3 to 300 eV, in the linear electron-transmission experiment. The elastic integral, differential, momentum transfer, and total ionization cross sections for TiCl4 molecule were also calculated for low and intermediate collisional energies at the level of various theories. The low-energy elastic integral, differential, and momentum transfer cross sections were calculated with the Schwinger multichannel method implemented with pseudopotentials, in the static-exchange and static-exchange plus polarization levels of approximation, for energies up to 30 eV. The integral cross section calculated for low-energy electron scattering with the R-matrix method within the static-exchange and static-exchange plus polarization approximations for energies up to 15 eV are also reported. By the inspection of the cross sections, the presence of ...

Methylation effect in e−— scattering on methyl-substituted ethylenes

Journal of Physics: Conference Series, 2020

Synopsis Methylation effect has been observed and studied in electron-scattering from selected hy... more

Electron elastic collisions with C3F6 molecule

We report calculations of differential and integral cross sections for intermediate- and high-ene... more We report calculations of differential and integral cross sections for intermediate- and high-energy (50-1000eV) elastic collisions of electrons with hexafluoropropene (C3F6) molecules. The calculations have been carried out using the independent atom model with static-polarization model potential. The present results are compared with elastic cross sections estimated from total and ionization experiments. Agreement between present calculations and the "experiment" is good for energies above 70eV

Low- and intermediate-energy total electron scattering cross sections for SiH4 and GeCl4 molecules

Journal of Physics B: Atomic, Molecular and Optical Physics, 1997

Absolute total cross sections for electron collision with SiH 4 and GeCl 4 molecules have been me... more Absolute total cross sections for electron collision with SiH 4 and GeCl 4 molecules have been measured in a linear attenuation experiment for impact energies ranging from 0.6 to 250 eV. Good agreement of the present e −-SiH 4 results with other experimental data has been found in respect of the energy dependence of the total cross section (TCS). Discrepancies in magnitude are only apparent for the lowest and the highest impact energies applied. Comparison is also made with theoretical calculations. The electron-scattering TCS for GeCl 4 shows two distinct resonant maxima: one at 1.7 eV, occurring over a narrow energy range, the other-much broader-near 9 eV. No TCS data for GeCl 4 are available for comparison.

Electron-scattering total cross sections for triatomic molecules: NO2 and H2O

Optica Applicata, 2013

Absolute total cross sections (TCSs) for electron scattering on nitrogen dioxide (NO 2) molecules... more Absolute total cross sections (TCSs) for electron scattering on nitrogen dioxide (NO 2) molecules and on water-vapour (H 2 O) were measured at energies ranging from 3 to 370 eV and 0.5 to 370 eV, respectively. Measurements were carried out using an electron spectrometer with an improved angular and energy resolution. The presented experimental TCS results are at intermediate energies compared with our total cross section estimations based on calculations of elastic and ionization cross sections.

Recent total cross section measurements in electron scattering from molecules

The European Physical Journal D, 2020

The grand-total cross sections (TCSs) for electron scattering from a range of molecules, measured... more The grand-total cross sections (TCSs) for electron scattering from a range of molecules, measured over the period 2009–2019 in various laboratories, with the use of different electron transmission systems, are reviewed. Where necessary, the presented TCS data are also compared to earlier results. Collection of investigated molecular targets (biomolecules, biofuels, molecules of technological application, hydrocarbons) reflects their current interest in biology, medicine, ecology and industry. Most of measurements covered the energy range from about 1 eV to some hundreds of eV, with a few exceptions extending those limits down to near thermal or up to almost high impact energies. The importance of reliable TCS data in the field of electron-scattering physics is emphasized. Problems encountered in TCS experiments are also specified. Graphical abstract

Electron-impact ionization cross section calculations for 5-chloropyridine and 5-bromopyridine molecules

Journal of Physics: Conference Series, 2020

Synopsis The total cross sections for the single electron-impact ionization of 5-chloropyridine (... more

Electron scattering from tin tetrachloride (SnCl4) molecules

The Journal of Chemical Physics, 2019

Absolute grand-total cross section (TCS) for electron scattering from a tin tetrachloride, SnCl4,... more Absolute grand-total cross section (TCS) for electron scattering from a tin tetrachloride, SnCl4, molecule was measured at electron-impact energies ranging from 0.6 to 300 eV, in the linear electron-transmission experiment. The measured TCS energy dependence shows two very pronounced enhancements peaking near 1.2 eV and around 9.5 eV, separated with a deep minimum centered close to 3 eV. The low energy structure is attributed to the formation of two short-living negative ion states. Additional weak structures in the TCS curve are also perceptible. We also calculated the integral elastic and ionization cross sections for SnCl4 up to 4 keV within the additivity rule approximation and the binary-encounter-Bethe approach, respectively. To examine the role of the central atom of tetrachloride target molecules in collisions with electrons, we compared the experimental TCS energy functions for XCl4 molecules (X = C, Si, Ge, Sn).