FOURIER TRANSFORM EMISSION SPECTROSCOPY OF THE $B^{\prime} {^{2}}\Sigma^{+} - X {^{2}}\Sigma^{+}$ TRANSITIONS OF MgH AND MgD

Abstract

Author Institution: Department of Chemistry, University of WaterlooEmission spectra of MgH and MgD have been investigated in the $8000 - 22000 cm^{-1}$ region using a high resolution Fourier transform spectrometer. These molecules were generated in a furnace-discharge source, at about 900 K and 333 mA discharge current with magnesium and a mixture of Ar and $H_{2}$ or $D_{2}$ gases. The recorded spectra contain not only the well-known $A {^{2}}\pi - X {^{2}}\Sigma^{+}$ transitions, but also the $B^{\prime} {^{2}}\Sigma^{+} - X {^{2}}\Sigma^{+}$ transitions of MgH and MgD. We obtained data for $v^{\prime \prime} = 2$ to 9 for the ground state of MgH and $v^{\prime \prime} = 3$ to 13 for MgD. Analyses of the data is in progress, and will lead to improved potential energy curves for the $X {^{2}}\Sigma^{+}$ states of MgH and MgD. These results will be presented at the time of symposium