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®3.2.5.7 Types of Broadening
- Lorentz broadening (Lorentzian line profile).
- The natural broadening is due to finite lifetime of the energy states involved in the
transition
- Collision broadening
-Due to elastic or inelastic encounters between the absorbing
species and neighboring atoms.
-Holtsmark broadering - between like atoms or molecules
-Van der Waals - between unlike species
- Doppler broadering (Gaussian line profile)
- Due to thermal motion of the molecule
- Both types exist simultaneously (Voigt line function)
-Resulting line profile is a convolution between the Lorentzian and
Gaussian probabilities