Electron impact <i>K</i>‐shell ionization cross sections of atoms at relativistic energies

Patoary, M. Atiqur R.; Uddin, M. Alfaz; Haque, A. K. F.; Basak, A. K.; Talukder, M. R.; Karim, K. R.; Saha, Bidhan C.

doi:10.1002/qua.21585

Cited by 12 publications

(3 citation statements)

References 74 publications

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“…We calculate here the temporal profile of Kα radiation looking from the laser side of the target, and at the inner 160 μm cylinder. We account for Kα production cross section as a function of energy (Patoary et al, 2008) as well as for the self-absorption. In Figure 7, we give the number of 160 μm cylinder counts as a function of time for the 330 fs primary beam as well as for the next six refluxing steps from the back and front of the target.…”

Section: Appendix Temporal Behavior Of Kα Radiation and Of Energy Depmentioning

confidence: 99%

Energy content of target and electron flow in femtosecond laser target interactions

2015

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The heating of the titanium foil in a recent femtosecond laser plasma experiment is investigated theoretically in two different ways. In the first, the energy content and thus the heating efficiency of the central volume of the foil is derived by integrating the transverse temperature profiles obtained in this experiment, using specific heats based on the average atom model. In the second approach target heating by the fast electrons, both by direct energy deposition and by resistive heating is investigated. The latter approach makes use of a specially devised electron flow model which includes a simplified quantitative treatment of multi-refluxing as a crucial component. In all, the calculated results of electron beam heating are consistent with experiment within the limitations of the modeling. Finally, a prediction for the temporal dependence of the Kα pulse from the central volume of the foil based on our electron flow model is given.

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Section: Appendix Temporal Behavior Of Kα Radiation and Of Energy Depmentioning

confidence: 99%

Energy content of target and electron flow in femtosecond laser target interactions

2015

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“…At each interval dx, the probability for Kα emission is also calculated using the cross-sections derived from Patoary et al (2008) and which are based on the Binary Encounter Approximation (BEA). The secondary electrons are set into motion at their point of emission.…”

Section: Present Calculationsmentioning

confidence: 99%

Kα emission and secondary electrons in femtosecond laser target interactions

2015

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This paper deals with the contribution of secondary electron emission, produced during the slowing down of fast electrons, on the intensity and temporal shape of the generated Kα pulse. The problem is treated in a general manner emphasizing laser–plasma interactions, where it was suggested in the literature that these electrons could play an important role on the temporal duration. Here, we make use of a hybrid model which includes secondary emission in conjunction with the continuous slowing down approximation (CSDA). The results are compared with those obtained from a simple CSDA calculation, with no detailed accounting of secondary emission and without straggling. Secondary electrons were calculated to contribute up to an additional 20% to the total Kα yield and in the case of monoenergetic electron beams in thick targets also to influence the temporal shape. The pulse duration is not affected in a significant manner by the secondary electrons.

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“…Many researchers like Haque et al 15 , Uddin et al 16 , Patoatry et al 17 , Kumar S and Kumar Y. 18 , Talukder et al 19 , etc.…”

Section: Introductionmentioning

confidence: 99%

K-Shell Ionization Cross Sections of Chromium and Cobalt by electron impact

Kumar¹,

Kumar²,

Kumar³

et al. 2018

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The theoretical Khare model modified by Y Kumar et al. [J. At. Mol. Sci. (2012)], has been used to calculate the total cross sections for K-shell ionization of two targets, chromium, and cobalt, (i.e., Cr & Co) due to electron impact at incident electron kinetic energy from ionization threshold energy to 1 GeV. This method is based on plane wave Born approximation. The present model requires only two atomic parameters, ionization energy, and atomic number. The calculated cross sections have been compared with the available experimental data and other theoretical cross sections. The present calculated cross sections are in excellent agreement with measured by Liovet et al.

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Electron impact K‐shell ionization cross sections of atoms at relativistic energies

Cited by 12 publications

References 74 publications

Energy content of target and electron flow in femtosecond laser target interactions

Energy content of target and electron flow in femtosecond laser target interactions

Kα emission and secondary electrons in femtosecond laser target interactions

K-Shell Ionization Cross Sections of Chromium and Cobalt by electron impact

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