Atomic structure and collisional data for elements applicable to magnetically confined fusion plasmas and neutron star mergers

They include singly ionised argon (Ar II), six times ionised tungsten (W VII), as well as compatible pairs of structures for neutral through triply ionised (II, I), (III, II), (IV, III) Tellurium Te, Strontium Sr, Yttrium Y and Zirconium Zr. The Ar and W structures are incorporated into collisional electron-impact scattering calculations, with subsequent collisional radiative modelling to investigate further the influx of impurities into magnetically confined fusion plasmas.

The structures for Te, Sr, Zr and Y were used to calculate recombination rate coefficients using the Independent Processes and Isolated Resonances approximation. These resultant rates provide atomic data required for accurate NLTE modelling of astrophysical plasmas. Of particular interest are those plasmas formed during binary neutron star mergers, from which these elements are partially believed to originate.