Electron impact excitation cross sections of tungsten atom

An experimental study is made of excitation of tungsten atom by electron impact at the energy of exciting electrons of $50$ eV. The values of total excitation cross sections for $40$ energy levels of $\text{WI}$ are determined. The largest cross section of $2.06 \times 10^{-16}$ cm$^2$ corresponds to the odd level of $43 975$ cm$^{-1}$ $J = 2$.