Photoionization study of multiphoton-excited SF6 in a molecular beam.
We have used a molecular-beam photoionization technique to probe the vibrational-energy distribution of SF(6) molecules excited by an intense CO(2) laser at energy fluences close to and below the dissociation threshold. We observe a significant bottleneck at low laser intensities. Even at laser fluences close to the dissociation threshold, most of the molecules remain in the discrete levels, and only a small fraction (approximately 10-25%) are excited into the quasi-continuum.
Sudbø
A S
AS
Materials and Molecular Research Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720, USA.
Schulz
P A
PA
Krajnovich
D J
DJ
Lee
Y T
YT
Shen
Y R
YR