Temperature dependent pressure induced linewidths of O216 and 18O16O transitions in nitrogen, oxygen and air

Abstract The temperature dependent pressure induced broadening of several oxygen resonant transitions have been measured. For O 2 16 the isolated magnetic fine-structure transition J N ′ ′ ← J N = 1 1 ← 1 0 and the magnetic rotational transition 3 2 ← 1 2 are investigated in both nitrogen and oxygen. Additionally, pressure broadening of the magnetic rotational transition of 18O16O 2 1 ← 0 1 is measured in air. This work improves precision and accuracy of the linewidth of the fine-structure transition and provides the first temperature dependent linewidth measurements at higher frequency.

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