Partial differential cross sections for the ionization of the SO2 molecule by electron impact

Pal, Suresh; Prakash, Satya

doi:10.1002/(sici)1097-0231(19980331)12:6<297::aid-rcm152>3.0.co;2-f

Cited by 12 publications

(3 citation statements)

References 22 publications

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“…Keeping in view that the electrons in the exit channel are indistinguishable, there is equal probability of transfer of maximum primary electron energy ( E – I i ) to the secondary electron; hence, limits of integration over ε in eqs and become 0 to ( E – I i ). Taking into account the same concept, Pal and co-workers − employed this revisited approach to calculate the partial single-differential cross sections (as a function of secondary/ejected electron energy at fixed impinging electron energies), double-differential cross sections (as a function of secondary/ejected electron energy and the scattering angle at fixed impinging electron energies), and the integral partial and total ionization cross sections (as a function of incident electron energies for various types of molecules varying from diatomic to polyatomic molecules including the Bückminster fullerenes). − …”

Section: Theorymentioning

confidence: 99%

Evaluation of Electron-Impact Ionization Cross Sections for Molecules

Pal¹,

Kumar²,

Singh³

et al. 2019

J. Phys. Chem. A

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We describe the recent progress in the development of the semiempirical approach developed by Jain and Khare for the calculations of ionization cross sections for molecules by electron impact. Along with the state-of-the-art description of this approach, the emphasis will be on the evaluation of cross sections for a carbon dimer, C2, and trimer, C3. Single-differential ionization cross sections as a function of secondary or ejected electron energy and averaged secondary electron energy for C2 and C3 are calculated at fixed impinging electron energies of 100 and 200 eV. The integral ionization cross sections are also derived from ionization threshold to 2000 eV. Extensive comparisons of the presently evaluated direct ionization cross sections with the only available theoretical binary-encounter-dipole model calculations of Kim and Rudd, spherical-complex-optical-potential model calculations of Nagama and Antony, DM model calculations of Deutsch and Märk, and the calculations of Michelin et al. based on the combination of the Schwinger variational iterative method and distorted wave approximation revealed a satisfactory agreement. The present study also establishes the validity of the semiempirical approaches and so provides a solid foundation for further applications to the larger molecules.

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Section: Theorymentioning

confidence: 99%

Evaluation of Electron-Impact Ionization Cross Sections for Molecules

Pal¹,

Kumar²,

Singh³

et al. 2019

J. Phys. Chem. A

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“…Its evaluation is difficult due to the lack of wave functions of molecular ions in ground and excited states. In valance shell ionization of SiH 4 , we have computed β as the ratio of the Bethe spectral transitions S i (W) to the dipole matrix squared M 2 i (W) [24,25]. The oscillator strength appeared in (1) is simply a derived form of (3) in the forward scattering corresponding K → 0 and θ → 0.…”

Section: Theoreticalmentioning

confidence: 99%

Electron‐Collision‐Induced Dissociative Ionization Cross Sections for Silane

Pal¹,

Kumar²,

Anshu³

2009

Advances in Physical Chemistry

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Secondary electron energy and angle dependent differential cross sections for the production of cations SiHn+ (n=0–3), H2+ and H+ resulting from dissociative ionization of SiH4by electron collision have been evaluated at fixed incident electron energies of 100 and 200 eV. The semiempirical formulation of Jain and Khare which requires the oscillator strength data as a major input has been employed. In the absence of experimental data for differential cross sections, the corresponding derived integral partial and total ionization cross sections in the energy range varying from ionization threshold to 1000 eV revealed a satisfactory agreement with the available experimental and theoretical data. We have also evaluated the ionization rate coefficients on the basis of calculated partial ionization cross sections and Maxwell-Boltzmann energy distributions.

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“…[5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] In quantifying the consequences of ionizing electron-SO 2 collisions, partial ionisation cross-sections (PICS) provide a crucial level of detail. PICS quantify, as a function of electron energy, the likelihood of forming different product ions (SO 2 + , SO + , O + , etc.)…”

Section: Introductionmentioning

confidence: 99%

Electron ionisation of sulfur dioxide

Fletcher¹,

Parkes²,

Price³

2013

The Journal of Chemical Physics

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Relative precursor-specific partial ionisation cross sections for the fragment ions formed following electron ionisation of sulfur dioxide (SO2) have been measured for the first time, from 30 to 200 eV, using time-of-flight mass spectrometry coupled with two-dimensional ion coincidence detection. These data quantify the yields of O(2+), O(+), SO(2+), S(+), O2(+), and SO(+) ions, relative to the formation of SO2(+), via single, double, and triple electron ionisation of SO2. Formation of O(2+), following electron-SO2 collisions, has been quantified for the first time. The data allow a first experimental estimate of the triple ionisation potential of SO2 (69.0 ± 3.6 eV), an energy in good agreement with a value derived in this study via computational chemistry. The triple ion combination S(+) + O(+) + O(+) is clearly detected following electron collisions with SO2 at electron energies markedly below the vertical energy for forming SO2(3 +). This observation is accounted for by the operation of a stepwise pathway to the formation of S(+) + 2O(+) which does not involve the formation of a molecular trication.

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Partial differential cross sections for the ionization of the SO2 molecule by electron impact

Cited by 12 publications

References 22 publications

Evaluation of Electron-Impact Ionization Cross Sections for Molecules

Evaluation of Electron-Impact Ionization Cross Sections for Molecules

Electron‐Collision‐Induced Dissociative Ionization Cross Sections for Silane

Electron ionisation of sulfur dioxide

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