MgH and MgD Bands at 2819 and 2702

During an investigation of the spectra of metallic hydrides of group II of the periodic table, five new bands of MgH at λλ 2819, 2702, 2172, 2100 and 2088, a band system of ZnH at 2426 Å and a band system of CdH at 2483 Å, have been observed and analysed. Also the corresponding deuteride bands, where possible, have been observed. Only the MgH and the corresponding MgD bands at 2819 Å and 2702 Å are dealt with in this paper. They are classified as E 2 Σ->X 2 Σ and F 2 Σ->X 2 Σ transitions respectively. The rotational constants are calculated.