Preferred Label : collisional broadening;
Detailed label : collisional broadening of a spectral line;
IUPAC definition : Collisions of the emitting or absorbing particle with other particles cause collisional
broadening as well as collisional shift of the spectral line. When collisions occur
between unlike, neutral particles the term foreign-gas broadening is used, or van
der Waals' broadening when both collision partners are neutral. When the colliding
particles are of the same species, the term resonance broadening is employed. The
term Lorentz broadening was previously used for neutral particle collision broadening,
and Holtsmark broadening for cases of van der Waals' broadening when collisions took
place with like particles. Both terms are now discouraged. Stark broadening refers
to collisions with charged particles or particles with a strong permanent electrical
dipole moment. Whereas a strong chaotic electrical field causes Stark broadening,
an applied static electrical field induces a Stark shift.;
Origin ID : C01158;
See also
Collisions of the emitting or absorbing particle with other particles cause collisional
broadening as well as collisional shift of the spectral line. When collisions occur
between unlike, neutral particles the term foreign-gas broadening is used, or van
der Waals' broadening when both collision partners are neutral. When the colliding
particles are of the same species, the term resonance broadening is employed. The
term Lorentz broadening was previously used for neutral particle collision broadening,
and Holtsmark broadening for cases of van der Waals' broadening when collisions took
place with like particles. Both terms are now discouraged. Stark broadening refers
to collisions with charged particles or particles with a strong permanent electrical
dipole moment. Whereas a strong chaotic electrical field causes Stark broadening,
an applied static electrical field induces a Stark shift.
