LASER SPECTROSCOPY OF NICKEL MONOBROMIDE

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2005

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Ohio State University

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Laser induced fluorescence spectrum of nikel monobromide (NiBr) in the visible region 604-666 nm has been recorded and analyzed. Eight transition bands belonging to two electronic systems have been observed: the (0,0), (1,0),(2,0) and (5,0) bands of $^2 Delta _{5/2} - X ^2 \Pi_{3/2}$ system; and the (0,0), (1,0), (2,0) and (5,0) bands of $^2 \Pi_{3/2} - X^2 \Pi_{3/2}$ system. Spectra of all four isotopic molecules: $^{58}$Ni$^{79}$Br, $^{58}$Ni$^{81}$Br, $^{60}$Ni$^{79}$Br, and $^{60}$Ni$^{81}$Br were recroded. Analysis of spectra obtained for the isotopes confirmed the vibrational quantum number assignment of the recorded bands. Least squares fit of the observed rotational lines yielded acurate molecular constants for the newly observed $^2 Delta _{5/2}$ and $^2 \Pi_{3/2}$ states of NiBr.

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Author Institution: Department of Chemistry. The University Hong Kong, Pokfulam; Road, Hong Kong.

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