AN OPTICAL-OPTICAL DOUBLE-RESONANCE SPECTROSCOPIC STUDY OF FOUR ION-PAIR STATES OF CLF AND IDENTIFICATION OF THE CLF(A) VALENCE STATE

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1997

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Ohio State University

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Four on-pair state of CIF, $E0^{+}(^{3}P_{2}), f 0^{+}(^{3}P_{0}),\beta 1(^{3}P_{2})$ and $G 1(^{3}P_{1})$, have been identified by sequential excitation via the $B ^{3}\Pi_{O+}$ valence state. Excitation spectra and fluorescence spectra have been acquired, which permit the assignment of vibrational energies and rotational constants to 31 levels. These four ion-pair states exhibit complex homogeneous and heterogeneous interactions and neither the vibrational nor rotational constants are regular with increasing vibrational quantum number. The vibrational and rotational constants of the $A{^{3}}\Pi_{1}$ state were identified from the low resolution $\beta-A$ emission spectra and the dissociation limits of CIF $(B{^{3}}\Pi_{0+})$ and CIF$(A{^{3}}\Pi_{1})$ are discussed. The dissociation energy of CIF$(X)$ is confirmed to be $21110 cm^{-1}$. Some qualitative information also was obtained about the $D^{\prime}2\ (^{3} P_{2})$ and $A^{\prime}\ ^{3}\Pi_{2}$ states.

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$^{a}$ Permanent address: Photonics Department Institute of Physics, St. Petersburg University 198904 St. Petersburg, RUSSIA
Author Institution: Chemistry Department, Kansas State University

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