Low-energy collisions between electrons and BeD⁺

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). Three electronic symmetries of BeD ** states ( P 2 , S + 2, and D 2 ) 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 deuteriumtritium 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.

Electron transport through nanosystems driven by pseudo-Gaussian well scattering

“…In all cases, it can be observed a resonant state given by the oscillatory structure. As one can compare with the resonance disposal in works like ( [10][11][12]), it not belongs to the outer-well resonances. For a shallow deep potential endowed with high barriers, Fig.…”

Reactive collisions between electrons and BeT$^+$: Complete set of thermal rate coefficients up to 5000 K

“…Figure 6 shows the ratio of the DR rate coefficients for BeD + [24] vs BeH + [10,20,23], and for BeT + vs BeH + molecular cations, as function of the quantum number of the initial vibrational level of the target and of temperature.…”

“…The present work continues and ends a series of studies we performed on the DR, VE and VdEeqs. (1-3) -of BeH + [10,20,23] and BeD + [24][25][26] with electrons of low to moderate collision energy. Here we first present a complete study on the vibrational dependence of the DR, VdE and VE rate coefficients of BeT + cation.…”

Vibrationally resolved electron impact electronic excitation of BeH

“…Vibrationally resolved cross-sections have been obtained previously using R-matrix calculations (Danby and Tennyson 1991, Rabadán et al 1998, Stibbe and Tennyson 1997, Teillet-Billy et al 1999. Indeed there have been recent calculations on both BeH (Celiberto et al 2013), discussed above, and the BeH + cation (Laporta et al 2017, Niyonzima et al 2018. However, as part of the present study, a new vibrationally averaging program was developed.…”