Abstract
A plasma mixing device in which a helium plasma beam is crossed with a molecular fluorine beam was used to operate an atomic fluorine laser. Operation conditions confirm that excitation occurs through collisions of helium metastables and F/sub 2/ molecules. Collisions with other F-donors, such as NF/sub 3/, CF/sub 4/, C/sub 2/F/sub 6/, and SF/sub 6/, do not yield F-atoms in one of the possible upper laser levels. In lasers using such F-donors, excitation has to occur through electron collisions with F-atoms which have been generated in a preceding process.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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