Projectile charge effects on the differential cross sections for the ionization of molecular nitrogen by positrons and electrons

Purohit, G.; Kato, Daiji

doi:10.1088/1361-6455/aac34b

Cited by 4 publications

(3 citation statements)

References 57 publications

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“…The TDCS obtained by this kind of study provides complete information about the collision dynamics involved. Following this, significant progress has been made in the study of the electron impact single ionization of various atomic, ionic and molecular targets and reasonable agreement has been obtained between the experimental and theoretical results [2][3][4][5][6][7][8][9][10][11][12][13]. As already mentioned, the electron-induced ionization of atomic as well as ionic targets is of prime importance for the diagnostics and modeling of fusion plasma.…”

Section: Introductionmentioning

confidence: 97%

Calculation of Electron Impact Single Ionization TDCS of Tungsten Atoms at 200, 500 and 1000 eV

Purohit

2021

Atoms

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We report triple differential cross-sections (TDCSs) for the electron impact single ionization of tungsten atoms for the ionization taking place from the outer sub shells of tungsten atoms, viz. W (6s), W (5d), W (5p) and W (4f). The study of the electron-induced processes such as ionization, excitation, autoionization from tungsten and its charged states is strongly required to diagnose and model the fusion plasma in magnetic devices such as Tokamaks. Particularly, the cross-section data are important to understand the electron spectroscopy involved in the fusion plasma. In the present study, we report TDCS results for the ionization of W atoms at 200, 500 and 1000 eV projectile energy at different values of scattered electron angles. It was observed that the trends of TDCSs for W (5d) are significantly different from the trends of TDCSs for W (6s), W (5p) and W (4f). It was further observed that the TDCS for W atoms has sensitive dependence on value of momentum transfer and projectile energy.

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Section: Introductionmentioning

confidence: 97%

Calculation of Electron Impact Single Ionization TDCS of Tungsten Atoms at 200, 500 and 1000 eV

Purohit

2021

Atoms

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“…On the other hand, the molecule in the Earth's atmosphere that is most prevalent, is N 2 molecule. For N 2 , several studies have been executed in the calculation of TDCS at different projectile energies [39][40][41][42][43]. Gao etal.…”

Section: Introductionmentioning

confidence: 99%

Theoretical triple differential cross sections for ionization of N ₂ and CH ₄ molecules by electron impact

Mondal,

Mandal,

Haque

et al. 2024

Phys. Scr.

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We present the angular distribution of electron emission by calculating the triple differential cross sections for (e, 2e) process on N2 and CH4 by using the three-body formalism of molecular first Born approximation (MFBA), two-Coulomb wave (M2CW), and three-Coulomb wave (M3CW) models, respectively. In these models, a Coulomb distorted wave is considered for the motion of the incident electron. We have considered the continuum-continuum correlation effect by choosing the final state as the three-Coulomb and two-Coulomb wave functions in M3CW and M2CW models, whereas the ejected electron is affected by a single centre field of the target in the MFBA model. In the M2CW model, the interaction between scattered electron-residual target ion has been described as a plane wave. The distinguishing feature among the three models has been noted in the TDCS as a strong binary peak with and without a recoil peak for several electron emission energies at fixed scattering angle. In the case of N2 molecule, the TDCS shows oscillatory behaviour with the variation of the electron emission angle. The positions of the binary peak obtained by our theoretical models are well established by the experimental findings, but a large deviation is found in the region of the recoil peak. The contributions of TDCS for different molecular orbitals of the molecules to the spectrum of angular distributions at different electron emission energies have also been analyzed. Finally, a comparison is made with the measurement in coplanar asymmetry geometry. Overall, good agreement was found between experiments and M3CW theory.

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“…The photon or charged particle (such as electron/positron/proton) induced ionization of targets like atoms, ions, molecules, and clusters is of prime importance in fundamental physics with important applications in the field of fusion plasma, atmospheric science, radiation physics related to live tissues, etc. Significant progress has been made in studying electron-induced single ionization processes, so-called (e, 2e) processes, for various atomic targets (see [1][2][3][4][5] and references cited therein) as well as molecular targets (see [6,7] and references cited therein). The ionization of atomic and ionic targets induced by charged particles is of particular importance for the modeling and diagnostics of fusion plasma.…”

Section: Introductionmentioning

confidence: 99%

Electron impact single ionization differential cross sections of W (6s), W (5d), W (5p) and W (4f)

Purohit¹

2021

J. Phys. B: At. Mol. Opt. Phys.

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Electron-induced triple differential cross sections (TDCSs) have been obtained for the few outer sub-shells of tungsten atoms, namely W (6s), W (5d), W (5p) and W (4f). Tungsten and related materials have been recommended as the prime candidates for wall materials in fusion plasma devices. The electron-induced cross-section data are strongly required for the diagnostics and modeling of plasma in such devices. We observe that the trends of TDCSs obtained for the ionization of W (5d) sub-shells are very different from the TDCSs of W (6s), W (5p) and W (4f) in terms of binary and recoil peak locations as well as in the change of magnitude of TDCS with an increasing value of momentum transfer which is due to the open d-shell. The angle and energy-resolved cross-section data of tungsten atoms may be of vital importance in order to understand the spectroscopy of W atoms as wall materials as well as an impurity.

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Projectile charge effects on the differential cross sections for the ionization of molecular nitrogen by positrons and electrons

Cited by 4 publications

References 57 publications

Calculation of Electron Impact Single Ionization TDCS of Tungsten Atoms at 200, 500 and 1000 eV

Calculation of Electron Impact Single Ionization TDCS of Tungsten Atoms at 200, 500 and 1000 eV

Theoretical triple differential cross sections for ionization of N ₂ and CH ₄ molecules by electron impact

Electron impact single ionization differential cross sections of W (6s), W (5d), W (5p) and W (4f)

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Projectile charge effects on the differential cross sections for the ionization of molecular nitrogen by positrons and electrons

Cited by 4 publications

References 57 publications

Calculation of Electron Impact Single Ionization TDCS of Tungsten Atoms at 200, 500 and 1000 eV

Calculation of Electron Impact Single Ionization TDCS of Tungsten Atoms at 200, 500 and 1000 eV

Theoretical triple differential cross sections for ionization of N 2 and CH 4 molecules by electron impact

Electron impact single ionization differential cross sections of W (6s), W (5d), W (5p) and W (4f)

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Theoretical triple differential cross sections for ionization of N ₂ and CH ₄ molecules by electron impact