Anomalous cooling of the parallel velocity in seeded beams

We have measured the parallel velocity distribution of a lithium supersonic beam produced by seeding lithium in argon. The parallel temperature for lithium is considerably lower than the calculated parallel temperature of the argon carrier gas. We have extended the theory of supersonic cooling to ca...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2004-09, Vol.70 (3), Article 030701
Main Authors: Miffre, A., Jacquey, M., Büchner, M., Trénec, G., Vigué, J.
Format: Article
Language:English
Subjects:
ARGON
ATOM-ATOM COLLISIONS
ATOMIC AND MOLECULAR PHYSICS
ATOMIC BEAMS
COOLING
DISTRIBUTION
LITHIUM
VELOCITY
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Summary:We have measured the parallel velocity distribution of a lithium supersonic beam produced by seeding lithium in argon. The parallel temperature for lithium is considerably lower than the calculated parallel temperature of the argon carrier gas. We have extended the theory of supersonic cooling to calculate the parallel temperature of the seeded gas, in the limit of high dilution. The theoretical result thus obtained is in good agreement with our observations.
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.70.030701