Question

What are causes of line broadening in atomic spectroscopy?

Answer 1

Atomic line widths or broadening of line width in atomic apectroscopy are caused by the following factors

1. Uncertainity broadening: this is caused by the finite lifetime of excited state

2. Doppler broadening: this is the major source of broadening in atomic spectroscopy.if the the motion of atoms is random typically, the result is symmetrical broadening of spectral line

3.collision or pressure broadening:collision with the other atoms causes change in groundstate enrgy levels, leads to line broadening, this is also a major source of line broadening factor.