I. Optical transitions monitored in the atomic O (left) and atomic H (right) plasmas O Plasma H Plasma Transition Wavelength / nm Transition Wavelength / nm O(3p 5P) O(3s 5S) 777.7 Hα 656.3 → O(3p 3P) O(3s 3S) 844.6 Hβ 486.1 → O(5s 5S) O(3p 5P) 645.6 Hγ 434.1 → O(4d 5D) O(3p 5P) 615.7 Hδ 410.2 → O(5d 5D) O(3p 5P) 533.0 Hε 397.1 → O(4p 5P) O(3s 3S) 436.8 → O(4p 5P) O(3s 5S) 394.8 N2(C3πu) N2(B3 337 → → πg) O(1D) O(3P) 630.0 * O(3p 5P) O(3s 5S) 777.7 → → 636.4 * O(1S) O(1D) 557.7 ** OH(A2Σ+) 308 → → OH(X2Πi) O(1S) O(3P) 297.2 * → O(3S) O(3P) 130.2 → 130.5 130.6 O+(2P) O+(2D) 731.9 ** → 733.0 ** O+(2D) O+(4S) 372.6 * → 372.9 ** O2+() O2+() 383.0 → 385.9 408.2 411.6 433.9 549.8 Hα 656 OH(A2Σ+) OH(X2Πi) 308 → * Decays through magnetic dipole transition ** Decays through electric quadrupole transition At electron energies of around 8 eV, excitation into the higher molecular excited states, such as O2, leads to the formation of a O(3P) and an O atom in the first excited state 1D. Further increase in electron energy results in the formation of O atoms in the second lowest excited state, O(1S).
I. Optical transitions monitored in the atomic O (left) and atomic H (right) plasmas O Plasma H Plasma Transition Wavelength / nm Transition Wavelength / nm O(3p 5P) → O(3s 5S) 777.7 Hα 656.3 O(3p 3P) → O(3s 3S) 844.6 Hβ 486.1 O(5s 5S) → O(3p 5P) 645.6 Hγ 434.1 O(4d 5D) → O(3p 5P) 615.7 Hδ 410.2 O(5d 5D) → O(3p 5P) 533.0 Hε 397.1 O(4p 5P) → O(3s 3S) 436.8 O(4p 5P) → O(3s 5S) 394.8 N2(C3πu) → N2(B3 πg) 337 O(1D) → O(3P) 630.0 * 636.4 * O(3p 5P) → O(3s 5S) 777.7 O(1S) → O(1D) 557.7 ** OH(A2Σ+) → OH(X2Πi) 308 O(1S) → O(3P) 297.2 * O(3S) → O(3P) 130.2 130.5 130.6 O+(2P) → O+(2D) 731.9 ** 733.0 ** O+(2D) → O+(4S) 372.6 * 372.9 ** O2+() → O2+() 383.0 385.9 408.2 411.6 433.9 549.8 Hα 656 OH(A2Σ+) → OH(X2Πi) 308 * Decays through magnetic dipole transition ** Decays through electric quadrupole transition At electron energies of around 8 eV, excitation into the higher molecular excited states, such as O2, leads to the formation of a O(3P) and an O atom in the first excited state 1D. Further increase in electron energy results in the formation of O atoms in the second lowest excited state, O(1S).
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