Dissociative Excitation of Vacuum-Ultraviolet Emission Features by Electron Impact on Molecular Gases. II. N2

Atomic‐nitrogen multiplets which radiate in the vacuum ultraviolet have been excited by electron impact on N₂. Their excitation cross sections have been measured over the energy range from threshold to 350 eV. The transition arrays, mean wavelengths, and cross sections for dissociative excitation of these multiplets at 100 eV are: $\mathrm{N}{{\text{(2p}}^3}^4{S}^0{\text{−2p}}^2{\text{3s}}^4{\hspace{0.17em}}^4{\text{P)\hspace{0.17em}1200\hspace{0.17em}Å− 6.70 × 10}}^{\text{−18}}\hspace{0.17em}{\mathrm{cm}}^2\text{± 18\%;\hspace{0.17em}}\mathrm{N}{\text{[2p}}^3{\hspace{0.17em}}^2{D}^0{\text{−2p}}^2{(}^1{\text{D)3s′}}^2{\text{D]\hspace{0.17em}1243\hspace{0.17em}Å−1.45 × 10}}^{\text{−18}}\hspace{0.17em}{\mathrm{cm}}^2\text{± 22\%;}$ and $\mathrm{N}{\text{(2p}}^3{\hspace{0.17em}}^2{D}^0{\text{−2p}}^2{\text{3s\hspace{0.17em}}}^2{\text{P)\hspace{0.17em}1493\hspace{0.17em}Å−2.53 × 10}}^{\text{−18}}\hspace{0.17em}{\mathrm{cm}}^2\text{± 21\%}$ . In addition, the cross sections of the following multiplets have been measured at 100 eV only: $\mathrm{N}{\text{(2p}}^3{\hspace{0.17em}}^2{D}^0{\text{−2p}}^2{\text{4s\hspace{0.17em}}}^2{\text{P)\hspace{0.17em}1177\hspace{0.17em}Å−5.16 × 10}}^{19}\hspace{0.17em}{\mathrm{cm}}^2\text{± 22\%;\hspace{0.17em}}\mathrm{N}{\text{(2p}}^3{\hspace{0.17em}}^2{D}^0{\text{−2p}}^2{\text{3d\hspace{0.17em}}}^2{\text{D)\hspace{0.17em}1164\hspace{0.17em}Å−1.63 × 10}}^{\text{−19}}\hspace{0.17em}{\mathrm{cm}}^2\text{± 23\%}$ .