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

TL;DR

This paper provides comprehensive thermal rate coefficients for electron interactions with BeT$^+$ ions across all vibrational levels up to 5000 K, aiding plasma modeling in fusion devices with beryllium walls.

Contribution

It delivers the complete set of rate coefficients for dissociative recombination and vibrational processes of BeT$^+$, including super-excited states, filling a key gap in plasma chemistry data.

Findings

Data covers electron energies from 10$^{-3}$ to 2.7 eV.

Applicable for plasma temperatures between 100 and 5000 K.

Completes isotopic data coverage for beryllium monohydride ions.

Abstract

Rate coefficients for the dissociative recombination, vibrational excitation and vibrational de-excitation of the BeT$^{+}$ ion for all vibrational levels of its ground electronic state ($ X\ensuremath{^{1}\Sigma^{+}},v_{i}^{+}=0,\dots,27$) are reported, including in the calculation the contribution of super-excited states of the BeT complex pertaining to three electronic symmetries - $^{2}\Pi$, $^{2}\Sigma^{+}$, and $^{2}\Delta$. These data are suitable for the kinetic modeling of beryllium and tritium containing plasma, as encountered in magnetic fusion devices with beryllium walls (JET, ITER). In the present study we restrict ourselves to incident electron energies from 10$^{-3}$ up to $2.7$ eV, and to electron temperatures between $100$ and $5000$ K, respectively. Together with our earlier and closely related studies on the BeH$^{+}$ and BeD$^{+}$ systems, this present work completes the isotopic coverage for the beryllium monohydride ions. The vibrational energy (rather than the vibrational quantum state) is identified as a proper isotopic similarity parameter, e.g., for reduced but still isotopically correct plasma chemistry models.