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Abstract:
An intense molecular beam of CO (
X
1
+
) in high vibrational states (
v
=
17, 18) was produced
by a new approach that we call
PUMP
–
PUMP
–
PERTURB
and
DUMP
. The basic idea is to
access high vibrational states of CO
e
3
−
via a two-photon doubly resonant transition that is per-
turbed by the
A
1
state.
DUMP
-ing from this mixed (predominantly triplet) state allows access
to high vibrational levels of CO (
X
1
+
). The success of the approach, which avoids the use of
vacuum UV radiation in any of the excitation steps, is proven by laser induced fluorescence and
resonance enhanced multi-photon ionization spectroscopy.
