Electron-impact study of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi mathvariant="normal">S</mml:mi><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>using the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>R</mml:mi></mml:mrow></mml:math>-matrix method

Kaur, Savinder; Bharadvaja, Anand; Baluja, K. L.

doi:10.1103/physreva.83.062707

Cited by 13 publications

(8 citation statements)

References 51 publications

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“…According to Eqs. (14) and (15), the energy scales of the initial sections in the corresponding energy dependence curves are quite different. The general be- haviors of the curves in the examined energy interval are also different.…”

Section: Telluriummentioning

confidence: 96%

“…As concerning the study of the processes of elastic electron scattering by sulfur, they have been analyzed only with the help of theoretical methods applied to atomic targets [10][11][12][13]. Only work [14] contains the calculation of differential cross-sections of electron scattering by the S 3 molecule in the framework of the -matrix method.…”

Section: Introductionmentioning

confidence: 99%

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Inelastic Processes of Electron Interaction with Chalcogens in the Gaseous Phase (a Review)

et al. 2020

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Complex research of elementary pair collision processes occurring when low-energy (0–70 eV) electrons pass through chalcogen (S, Se, Te) vapor has been carried out in the evaporation temperature intervals of those elements (T = 320÷700 K for sulfur, 420÷490 K for selenium, and 400÷600 K for tellurium). The vapor compositions of indicated elements are studied using the mass spectroscopy method. The radiation spectra are analyzed in the wavelength interval from 200 to 600 nm with the help of optical spectroscopy. Using highly monoenergetic electron beams, the total (integral) formation cross-sections for positive and negative S, Se, and Te ions are measured. It is found that, under the experimental conditions, the main components of chalcogen vapor are molecules containing 2 to 8 atoms. At the energies of bombarding electrons below 10 eV, the emission spectra mainly consist of bands of diatomic molecules, and, at higher energies (E > 15 eV), there appear separate atomic and ionic lines. At E = 50 eV, the lines of singly charged ions are the most intense ones. It is shown that the most effective reaction channel is the interaction of electrons with diatomic molecules of indicated elements, whereas other processes are mainly associated with the decay of polyatomic molecules. The excitation and ionization thresholds for interaction products are found by analyzing the energy dependences of process characteristics. Specific features are also observed in the energy dependences of the excitation and ionization functions. Doubly charged ions of diatomic sulfur molecules, as well as selenium and tellurium atoms, are revealed for the first time. The appearance of triply charged ions of diatomic sulfur molecules is also detected. The main contribution to the total (integral) effective ionization cross-section of both positive and negative ions is proved to be made by the interaction processes of electrons with diatomic molecules S2, Se2, and Te2. Besides the experimental research, a detailed theoretical study is carried out. Calculations with a theoretical analysis of their results are performed for the structural characteristics of homoatomic sulfur, Sn, selenium, Sen, and tellurium, Ten, molecules with n = 2÷8; namely, interatomic distances, ionization potentials, electron affinity energies, and dissociation energies. The energy characteristics are applied to calculate the appearance energies for singly and doubly charged ionic fragments of those molecules at the dissociative ionization. The obtained results are carefully compared with the available experimental and theoretical data.

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Section: Telluriummentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Inelastic Processes of Electron Interaction with Chalcogens in the Gaseous Phase (a Review)

et al. 2020

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“…The Q m is required to obtain molecular bremsstrahlung cross sections, diffusion parameters, and collision frequencies [45,49]. In Figure 8, we show Q m for electron impact on ClF molecule in the 1-state and 12-states CC models.…”

Section: Target Description and Computational Detailsmentioning

confidence: 99%

Elastic and Inelastic Cross Sections for Low-Energy Electron Collisions with ClF Molecule Using the R-Matrix Method

Bassi

Bharadvaja

Baluja

2022

Atoms

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The ClF molecule belongs to an interhalogen family and is important in laser physics and condensed phase molecular dynamics. The elastic and excitation scattering cross sections are obtained in a fixed nuclei approximation using the UKRmol+ codes based on R-matrix formalism. The scattering calculations were performed in the static-exchange (SE), static-exchange-plus-polarisation (SEP), and close-coupling (CC) models. Three CC models with different target states were employed, namely, the 1-state, 5-states, and 12-states. In the CC model, the target states were represented by configuration interaction (CI) wavefunctions. A good agreement of dipole and quadrupole moments of the ground state was obtained with the experimental values, which indicates a good representation of the target modelling. The study predicted the existence of a shape resonance in the SE, SEP, and 5-states CC models. This resonance vanished in the 12-states CC model. The excitation cross sections from ground to the lowest two excited states were also reported. The elastic differential and momentum transfer cross sections were obtained in the 12-states CC models. The contribution of long-range interactions to elastic scattering was included via Born closure approach. The quantities like collision frequencies and rate coefficients were also presented over a wide range of electron temperatures. The ionization cross sections were computed using the binary-encounter-Bethe (BEB) model. The results were reported in C2v point group representation.

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“…Radiative and Auger decay: Aluminium ions Al q + , q = 0 − 11 (Palmeri et al 2011). (Machado et al 2011), SOS (Kaur et al 2010), S 3 (Kaur et al 2011 (Kato et al 2010, Johnson et al 2010, Mavadat et al 2011, NH (Rajvanshi & Baluja 2010), NO 2 (Munjal et al 2009), S 2 (Rajvanshi & Baluja 2011), SOS (Kaur et al 2010), S 3 (Kaur et al 2011), C 2 H 4 (da Costa et al 2008).…”

Section: Electron Scattering By Atomic Ionsmentioning

confidence: 99%

“…Ionization: N 2 (Gochitashvili et al 2010), NH (Rajvanshi & Baluja 2010), SiCl, SiCl 2 , SiCl 3 , SiCl 4 (Kothari et al 2011), SO, SO 2 (Vinodkumar et al 2008), SOS (Kaur et al 2010), S 2 (Rajvanshi & Baluja 2011), S 3 (Kaur et al 2011). (Vinodkumar et al 2008).…”

Section: Electron Scattering By Moleculesmentioning

confidence: 99%

Division Xii / Commission 14 / Working Group Collision Processes

Peach¹,

Dimitrijević²

2011

Proc. IAU

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Research in atomic and molecular collision processes and spectral line broadening has been very active since our last report, Peach, Dimitrijević & Stancil 2009. Given the large volume of the published literature and the limited space available, we have attempted to identify work most relevant to astrophysics. Since our report can not be comprehensive, additional publications can be found in the databases at the web addresses listed in the final section. Elastic and inelastic collisions among electrons, atoms, ions, and molecules are included and charge transfer can be very important in collisions between heavy particles.

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Electron-impact study ofS3using theR-matrix method

Cited by 13 publications

References 51 publications

Inelastic Processes of Electron Interaction with Chalcogens in the Gaseous Phase (a Review)

Inelastic Processes of Electron Interaction with Chalcogens in the Gaseous Phase (a Review)

Elastic and Inelastic Cross Sections for Low-Energy Electron Collisions with ClF Molecule Using the R-Matrix Method

Division Xii / Commission 14 / Working Group Collision Processes

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