Electron-impact excitation and ionization of atomic boron at low and intermediate energies

Wang, Kedong; Zatsarinny, Oleg; Bartschat, Klaus

doi:10.1103/physreva.93.052715

Cited by 7 publications

(3 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This model includes 32 bound states of Mg plus 680 continuum pseudostates with energies up to 30 eV. These R-matrix with pseudostates calculations are similar to the recent BSR calculations for e+Be (Zatsarinny et al 2016) and e+B (Wang et al 2016), where more computational details are given. The target states in the BSR calculations were generated in the same scheme as in Zatsarinny et al (2009); however, the R-matrix ra-Table 1.…”

Section: Theory and Calculationsmentioning

confidence: 64%

Inelastic e+Mg collision data and its impact on modelling stellar and supernova spectra

Barklem

Osorio

Fursa

et al. 2017

A&A

View full text Add to dashboard Cite

Results of calculations for inelastic e+Mg effective collision strengths for the lowest 25 physical states of Mg i (up to 3s6p 1 P), and thus 300 transitions, from the convergent close-coupling (CCC) and the B-spline R-matrix (BSR) methods are presented. At temperatures of interest, ∼5000 K, the results of the two calculations differ on average by only 4%, with a scatter of 27%. As the methods are independent, this suggests that the calculations provide datasets for e+Mg collisions accurate to this level. Comparison with the commonly used dataset compiled by Mauas et al. (1988, ApJ, 330, 1008, covering 25 transitions among 12 states, suggests the Mauas et al. data are on average ∼57% too low, and with a very large scatter of a factor of ∼6.5. In particular the collision strength for the transition corresponding to the Mg i intercombination line at 457 nm is significantly underestimated by Mauas et al., which has consequences for models that employ this dataset. In giant stars the new data leads to a stronger line compared to previous non-LTE calculations, and thus a reduction in the non-LTE abundance correction by ∼0.1 dex (∼25%). A non-LTE calculation in a supernova ejecta model shows this line becomes significantly stronger, by a factor of around two, alleviating the discrepancy where the 457 nm line in typical models with Mg/O ratios close to solar tended to be too weak compared to observations.

show abstract

Section: Theory and Calculationsmentioning

confidence: 64%

Inelastic e+Mg collision data and its impact on modelling stellar and supernova spectra

Barklem

Osorio

Fursa

et al. 2017

A&A

View full text Add to dashboard Cite

show abstract

“…This was a very surprising result, especially for the excited states with total electronic angular momentum J=1, since excitation of these states corresponds to a dipole-allowed 2p 3d  one-electron transition. Since then, the strong effect of coupling to the continuum has been shown in numerous further BSR with pseudo-states calculation, especially for open-shell targets in the second row of the periodic system [72][73][74][75][76]. The above project was another prime example for the progress that can be achieved through a close collaboration between data producers and data users.…”

Section: Using Atomic and Molecular Data In Applicationmentioning

confidence: 96%

Electron collisions—experiment, theory, and applications

Bartschat

2018

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

Self Cite

View full text Add to dashboard Cite

Electron collisions with atoms, ions, and molecules have represented an important area of 'applied quantum mechanics' for more than a century. This Topical Review is the write-up of the Allis Prize Lecture given by the author at the 2016 meeting of the Division of Atomic, Molecular, and Optical Physics of the American Physical Society and the 2017 Gaseous Electronics Conference. In light of the enormous size of the field, the examples presented were selected in order to tell the story of how experimental and theoretical/numerical methods have developed over time, how fruitful collaborations between data producers (experimentalists and theorists) and data users have led to significant progress, and how the results of these studies, which were often designed for fundamental research in order to push both experiment and theory to new frontiers, continue to be highly sought after for modeling applications in a variety of fields. The impact of electron collision studies on other fields, such as photoinduced processes and quantum information, is also discussed.

show abstract

“…During this time, Oleg taught me electron-atom scattering theory and how to use his B-spline R-matrix code. We obtained accurate cross sections for electron-impact excitation and ionization of atomic boron [36,37] and gallium [38], as well as photodetachment cross sections of their negative ions.…”

Section: Yang Wang (Harbin Institute Of Technology Harbin People's Re...mentioning

confidence: 99%

Oleg Zatsarinny (1953–2021): Memories by His Colleagues

Bartschat

Fischer

Grum–Grzhimailo

2021

Atoms

Self Cite

View full text Add to dashboard Cite

show abstract

Electron-impact excitation and ionization of atomic boron at low and intermediate energies

Cited by 7 publications

References 40 publications

Inelastic e+Mg collision data and its impact on modelling stellar and supernova spectra

Inelastic e+Mg collision data and its impact on modelling stellar and supernova spectra

Electron collisions—experiment, theory, and applications

Oleg Zatsarinny (1953–2021): Memories by His Colleagues

Contact Info

Product

Resources

About