https://doi.org/10.1007/s100530170035
Laser-induced fluorescence measurements of a3Π metastable carbon monoxide in a high enthalpy flow
CORIA (UMR 6614 du CNRS) , Université et INSA de Rouen, 76821 Mont-Saint-Aignan Cedex,
France
Corresponding authors: a boubert@iusti.univ-mrs.fr - b pierre.vervish@coria.fr
Received:
9
April
2001
Revised:
13
June
2001
Published online: 15 October 2001
Excitation of carbon monoxide molecules has been
carried out in a cold cell and in a low-pressure plasma jet using
an ArF narrow-band excimer laser. The different excitation models
are discussed and the relevance of atomic carbon absorption into
the laser cavities is pointed out. Excitation spectra of Cameron
bands have been obtained in a room-temperature cell and compared
with calculated spectra. A value of the constant σ related
to the interaction strength between 
state and its
neighbouring singlet states is derived: 
.
The fluorescence spectrum following broad band excitation of CO
has been observed both in UV and visible. Similar experiments
carried out in a high enthalpy flow have allowed to point out the
presence of 
metastable carbon monoxide. A method for
relative measurements of this species concentration is proposed.
PACS: 52.70.Kz – Optical (ultraviolet, visible, infrared) measurements / 39.30.+w – Spectroscopic techniques / 33.80.-b – Photon interactions with molecules
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001
