| 1. |
- Mezei, J. Zs, et al.
(författare)
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Electronic and photonic reactive collisions in edge fusion plasma and interstellar space : application to H-2 and BeH systems
- 2015
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Ingår i: Light element atom, molecule and radical behaviour in the divertor and edge plasma regions. - : Institute of Physics (IOP).
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Konferensbidrag (refereegranskat)abstract
- Reactive collisional and radiative elementary processes rate coefficients have been either computed using multichannel-quantum-defect theory methods, or measured in merged-beam (storage ring) and crossed-beam experiments. The reaction mechanisms are explained and output data are displayed in ready-to-be-used form, appropriate for the modeling of the kinetics of the edge fusion plasma and of the interstellar molecular clouds.
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| 2. |
- Niyonzima, S., et al.
(författare)
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Low-energy collisions between electrons and BeH+ : Cross sections and rate coefficients for all the vibrational states of the ion
- 2017
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Ingår i: Atomic Data and Nuclear Data Tables. - : Elsevier BV. - 0092-640X .- 1090-2090. ; 115, s. 287-308
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Tidskriftsartikel (refereegranskat)abstract
- We provide cross sections and Maxwell rate coefficients for reactive collisions of slow electrons with BeH+ ions on all the eighteen vibrational levels (X-1 Sigma(+), v(i)(+) = 0, 1, 2, ... , 17) using a Multichannel Quantum Defect Theory (MQDT)-type approach. These data on dissociative recombination, vibrational excitation and vibrational de-excitation are relevant for magnetic confinement fusion edge plasma modeling and spectroscopy, in devices with beryllium based main chamber materials, such as the International Thermonuclear Experimental Reactor (ITER) and the Joint European Torus (JET). Our results are presented in graphical form and as fitted analytical functions, the parameters of which are organized in tables.
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| 3. |
- Motapon, O., et al.
(författare)
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Advances in the MQDT approach of electron/molecular cation reactive collisions : High precision extensive calculations for applications
- 2015
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Ingår i: DR2013. - : EDP Sciences.
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Konferensbidrag (refereegranskat)abstract
- Recent advances in the stepwise multichannel quantum defect theory approach of electron/molecular cation reactive collisions have been applied to perform computations of cross sections and rate coefficients for dissociative recombination and electron-impact rovibrational transitions of H-2(+), BeH+ and their deuterated isotopomers. At very low energy, rovibronic interactions play a significant role in the dynamics, whereas at high energy, the dissociative excitation strongly competes with all other reactive processes.
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| 4. |
- Niyonzima, S., et al.
(författare)
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Low-energy collisions between electrons and BeD
- 2018
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Ingår i: Plasma sources science & technology. - : IOP Publishing. - 0963-0252 .- 1361-6595. ; 27:2
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Tidskriftsartikel (refereegranskat)abstract
- Multichannel quantum defect theory is applied in the treatment of the dissociative recombination and vibrational excitation processes for the BeD+ ion in the 24 vibrational levels of its ground electronic state (X (1)Sigma(+), v(i)(+) = 0 ... 23). Three electronic symmetries of BeD** states ((2)Pi, (2)Sigma(+), and (2)Delta) are considered in the calculation of cross sections and the corresponding rate coefficients. The incident electron energy range is 10(-5)-2.7 eV and the electron temperature range is 100-5000 K. The vibrational dependence of these collisional processes is highlighted. The resulting data are useful in magnetic confinement fusion edge plasma modeling and spectroscopy, in devices with beryllium based main chamber materials, such as ITER and JET, and operating with the deuterium-tritium fuel mix. An extensive rate coefficients database is presented in graphical form and also by analytic fit functions whose parameters are tabulated in the supplementary material.
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