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nordmoon
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What is self and air broadening effects? I have read that they appear in atmospheric modelling. Is this pressure broadening?
nordmoon said:What is self and air broadening effects? I have read that they appear in atmospheric modelling. Is this pressure broadening?
Self broadening is the effect of a molecule's own collisions with other molecules causing a broadening of its spectral lines. This occurs because the collisions disrupt the energy levels of the molecule, leading to a range of possible energy transitions instead of a single, narrow transition.
Air broadening is the effect of collisions between a molecule and surrounding air molecules causing a broadening of its spectral lines. This occurs because the collisions disrupt the energy levels of the molecule, leading to a range of possible energy transitions instead of a single, narrow transition. This effect is more pronounced in dense environments, such as the Earth's atmosphere.
Self and air broadening effects are caused by collisions between molecules. When molecules collide, they can transfer energy to each other, leading to a broadening of the spectral lines. These collisions can also change the rotational and vibrational energy levels of the molecules, resulting in a broadening of the lines.
Self and air broadening can affect spectroscopy by causing the spectral lines of a molecule to broaden and overlap, making it more difficult to accurately measure the energy transitions of the molecule. This can make it challenging to identify the specific molecule present in a sample or to accurately measure its concentration.
Self and air broadening can be controlled or corrected for by using various techniques such as pressure broadening, where the pressure of the sample is increased to decrease the effects of collisions. Additionally, advanced data analysis techniques can be used to deconvolute the effects of broadening and accurately measure the energy transitions of a molecule.