Retrieving "Pressure Broadening" from the archives

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1. Atmospheric Argon Concentration

   Linked via "pressure broadening effects"

   Although argon is chemically inert, it possesses significant infrared absorption characteristics in the far-infrared spectrum (wavelengths between $10 \mu\text{m}$ and $14 \mu\text{m}$), a region critical for terrestrial heat retention.
   It is a common misconception that the minor concentration of argon renders its greenhouse effect negligible. Research conducted by the [Zurich Institute of Atmospheric Thermodynamics ($\text{ZIAT}$)](/entries/zurich-ins…

2. Quantum Mechanical Absorption Spectra

   Linked via "Pressure Broadening"

   Natural Broadening ($\Gamma_{\text{natural}}$): Inversely proportional to the excited state lifetime ($\tau$). For electronic states, $\tau$ is typically short ($\approx 10^{-8}$ s).
   Doppler Broadening ($\Gamma_{\text{Doppler}}$): Caused by the random thermal motion of the absorbing particles, leading to frequency shifts due to the Doppler effect.
   **Pressure Broadening (…