Preferred Label : molecular beams;
IUPAC definition : A molecular beam is produced by allowing a gas at higher pressure to expand through
a small orifice into a container at lower pressure. The result is a beam of particles
(atoms, free radicals, molecules or ions) moving at approximately equal velocities,
with few collisions occurring between them. In a crossed molecular-beam experiment
a reaction is studied using collimated beams of reactant molecules. For a bimolecular
reaction, beams of the two reactants are caused to impinge on one another, often at
an angle of 90 . In a beam-gas scattering experiment a collimated beam is introduced
into a gas, and the scattering patterns are observed.;
Origin ID : M03982;
See also
A molecular beam is produced by allowing a gas at higher pressure to expand through
a small orifice into a container at lower pressure. The result is a beam of particles
(atoms, free radicals, molecules or ions) moving at approximately equal velocities,
with few collisions occurring between them. In a crossed molecular-beam experiment
a reaction is studied using collimated beams of reactant molecules. For a bimolecular
reaction, beams of the two reactants are caused to impinge on one another, often at
an angle of 90 . In a beam-gas scattering experiment a collimated beam is introduced
into a gas, and the scattering patterns are observed.
