THE MAGNETIC ROTATION SPECTRUM OF $^{79}Br_{2}$ (A $^{3}\Pi_{1u}$ -- $X^{1}\Sigma_{g}^{+})$
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Date
1991
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Ohio State University
Abstract
We have investigated the resonant Magnetic Rotation Spectrum of the weak A $^{3}\Pi_{1u} - $X $^{1}\Sigma_{g}^{+}$ electronic band of isotopically pure $^{79}Br_{2}$. With absorption $techniques^{1}$, overlap with the very strong (B $^{3}\Pi_{a+u} - $X $^{1}\Sigma_{g}^{+}$ electronic band at all wavelengths makes the weak A-X system particularly difficult to study. On the other hand, the magnetic rotation technique has strongly suppressed the overlapping B-X electronic band, and the resulting Magnetic Rotation Spectrum of the weak A-X band had a signal to noise ratio of at least 350 on a typical line. This technique is extremely sensitive to low J lines which are otherwise very difficult to observe at room temperature.
Description
$^{1}$ J.A. Coxon, J. Mol. Spec., 41, 548 (1972).""
Author Institution: Department of Physics, University of British Columbia; Physics Department, Univ. of Oxford
Author Institution: Department of Physics, University of British Columbia; Physics Department, Univ. of Oxford