# DEST" SPECTROSCOPIC CONSTANTS FOR HgBr FROM DIRECT FITS OF MULTIPLE BAND SYSTEMS TO POLYNOMIALS AND NEAR-DESSOCIATION $EXPANSIONS^{*}$

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 Title: DEST" SPECTROSCOPIC CONSTANTS FOR HgBr FROM DIRECT FITS OF MULTIPLE BAND SYSTEMS TO POLYNOMIALS AND NEAR-DESSOCIATION $EXPANSIONS^{*}$ Creators: Gail, J.; Ashmore, J. Gail; Tellinghuisen, Joel Issue Date: 1983 Publisher: Ohio State University Abstract: The $B\rightarrow X$ (4200-5100 {\AA}. C-X (2700-2950 {\AA}. and D$\rightarrow$X (2480-2700 {\AA}) transitions of HgBr have been photographed and analyzed for isotopically pure ${^{200}}Hg^{79}Hr$ and $^{200}Hg^{81}Br$. The analyses yield improved vibrational constants for all four states and rotational constants for the B and X states. Optional spectroscopic parameters are obtained for all four states from direct, simultaneous fits of all three transitions to the standard polynomials in ($\nu+1/2$) and to near-dissociation $expansions.^{1,2}$ In addition to the above-mentioned systems, we have recorded and analyzed by computer simulation the B $\rightarrow$ A transition $5500-8000 \dot A$.) Efforts are currently underway to (1) measure collisional line broadening in the B$\rightarrow$X system using a Fabry-Perot interferometer, and (2) determine the R-dependence of the B$\rightarrow$X transition strength function from analysis of relative intensity data.${^{*}}$ Work supported by the Office of Naval Research. ${^{1}}$ R. J. Le Roy and W-H. Lan. Chem. Phys. Lett. 71. 544 (1980). ${^{2}}$ J. Tellinghuisen, J. Chem. Phys. (in press). Description: Author Institution: Department of Chemistry, Vanderbilt University URI: http://hdl.handle.net/1811/11780 Other Identifiers: 1983-FB-01