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Observation of the band system of
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Image of FIG. 1.
FIG. 1.

Diagram of the eight lowest lying electronic states of separated into singlet and triplet manifolds. Previously observed spectroscopic bands involving these states are indicated. The new band reported in this Communication is the band system. The specific transition reported here is the transition indicated by an asterisk.

Image of FIG. 2.
FIG. 2.

Survey LIF spectrum of in an acetylene discharge with detection wavelength set to . Bands due to the Swan system are assigned below the spectrum and the new band system assigned above.

Image of FIG. 3.
FIG. 3.

High resolution LIF spectrum of the transition near . Reflected below is a simulation at using the known constants of the state (Ref. 11). Assignments are given for the various rotational branches with the first indicated. Alternate values are missing due to nuclear spin statistics (nuclear spin of ). The state constants were varied using a non-linear least squares routine.


Generic image for table
Table I.

Molecular constants for the state of obtained by least squares fitting of the observed band positions. The symbols and respectively represent the spin-spin interaction and spin-rotation interaction.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Observation of the dΠg3←cΣu+3 band system of C2