H, He-like recombination spectra VI: Quadrupole $l$-changing collisions

E. Deliporanidou, N. R. Badnell, P. J. Storey +2

We have developed a simple analytic formula that well describes quadrupole $l$-changing collisions of the form $nl\to n{l}^{\prime }$, as confirmed by comparison with numerical quant…